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Instant Omni Plus 18L vs Oster French Door Toaster Oven Side-by-Side Comparison

Instant Omni Plus 18L vs Oster French Door Toaster Oven. The outcome between these two convection toaster ovens demonstrates that size isn’t everything.

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Instant Omni Plus 18L

Oster French Door

Instant Omni Plus 18L vs Oster French Door Toaster Oven

Overall Verdict

8.5
Overall Score
6.5
Overall Score
  • Performance (50%)8.2
  • Design (25%)9.3
  • Usability (25%)8.4
  • Performance (50%)6.4
  • Design (25%)6.7
  • Usability (25%)6.4

The outcome of the battle between the Instant Omni Plus 18L Air Fryer Toaster Oven and the Oster French Door Convection Toaster Oven demonstrates that size isn’t everything. The latter has a larger size and low scores than the former in every aspects; and it’s more expensive as well.

Both units are digital but the Instant has a more informative display and more intuitive controls, not to mention its extra functionality. It also has more accessories, namely a rotisserie kit and air fryer basket, to accommodate all cooking methods.

Performance-wise, the Omni Plus 18L has a more powerful output, convection setting, and combo heating elements to deliver the best results in every tests, whether it’s toasting bread, baking pizza, roasting whole chicken, or air frying fries.

Pros & Cons

  • Informative and eye-catching package
  • Smart Programs and cooking status bar
  • Electrical safety feature for the door
  • Convenient slide-out crumb tray
  • Safeguards for all heating elements
  • Complimentary app with detailed instructions and numerous recipes
  • Helpful toggles
  • Easy-to-clean stainless steel exterior
  • Large capacity
  • Interior lighting available
  • Easy-to-clean stainless steel exterior
  • Sturdy build
  • Air-ventilation holes on all sides
  • Cool-touch door handles
  • Convenient slide-out crumb tray
  • Touchscreen digital displays need more contrast
  • The master-control knob can be confusing
  • No convection toggle
  • Buttons not reliably responsive
  • Not very budget-friendly

Key Specs

Dimensions
L16.54 x W15.75 x H13.90 inches
L21.53 x W19.96 x H12.79 inches
Weight
25.4 lbs (11.5 kg)
16.8 lbs (7.6 kg)
Control Type
black LCD digital touchscreen + one master-control knob
LCD + 15 buttons
Temperature
150°F - 450°F
150°F - 450°F
Timer
1 - 60 minutes
1 minute - 6 hours
Cooking Functions
8
8

Where to Buy?

Price at publication
$233.55
$191.53

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Analysis and Test Results

Performance

Overall Performance Scoring
8.2
6.4

Toast

7.5
6.0
From left to right, 24 pieces of toast for the top and bottom of three toast levels including lighter, medium, and darker.
On the left: Level 1; In the middle: Level 2; On the right: Level 3
From left to right, 24 pieces of toast for the top and bottom of three toast levels including lighter, medium, and darker.
The top and bottom of the best four pieces of toast from the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
On the left are the top and bottom of four pieces of toast from the first batch, and on the right are from the second batch.
Oster French Door Toaster Oven Toast Test
From left to right, 24 pieces of toast for three toast levels including lighter, medium, and darker. On the upper row are the top sides, and on the lower row are the bottom sides of the toast.
The best four pieces of toast from the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven. On the left are the top sides, and on the right are the bottom sides of the toast.
On the left are four pieces of toast from the first batch, and on the right are from the second batch. On the upper row are the top sides, and on the lower row are the bottom sides.
Function
Toast
Toast
Number of Slices
4
4
Toast Level
2/5
4/6
Cooking Time
5m 25s
7m 25s
Second Batch
4m 1s
5m 31s
Convection
No
No

Pizza

8.6
6.3
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top inside a baking pan.
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top inside a baking pan.
The cross-section of a toaster oven baked pizza slice showing the crust. In the background is a pizza inside a baking tray.
Two hands break apart a slice of pizza with melty cheese, meat, and green bell peppers on top baked using a toaster oven.
Oster French Door Toaster Oven Pizza Test
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top. The pizza is inside a grooved silver baking pan on a white background.
Two slices of toaster oven baked pizza on top of one another. It’s a 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top. The pizza is inside a grooved silver baking pan.
On a white background, two hands break apart a slice of baked pizza using a toaster oven with cheese, meat, and green bell peppers on top.
Function
Bake
Turbo Convection
Temperature
450°F
450°F
Cooking Time
3m 50s
6m
Convection
High
Yes

Roasted Whole Chicken

8.4
8.1
A whole roasted rotisserie chicken using a toaster oven on an enamel baking pan on a white background.
A whole roasted rotisserie chicken using a toaster oven on an enamel baking pan on a white background.
A tray of whole toaster oven roasted chicken. The thermometer has two probes inside the chicken and displays 178°F and 190°F.
Seven pieces of a carved chicken including a carcass, two breasts, two wings, and two thighs on an enamel baking pan.
The close-up of a pulled-apart roasted chicken thigh. In the background is the rest of the roasted chicken on a tray.
Oster French Door Toaster Whole Roasted Chicken Test
A whole roasted chicken using a toaster oven on a white background. The chicken is belly up on a baking rack with a silver baking pan below.
A whole chicken roasted using a toaster oven on a baking rack with a silver baking pan below. The thermometer displays the same temperature of 181°F from two probes inserted into the right and left thighs of the chicken.
The roasted chicken is carved into ten pieces on a baking rack with a silver baking pan below. There are three pieces of the carcass, two wings, two thighs, two breast pieces, one drumstick, and two fallen leg bones.
Two hands pulling apart a juicy chicken thigh roasted in a toaster oven. In the white background is the rest of the roasted chicken on a baking rack with a silver baking pan below.
Function
Roast
Turbo Convection
Temperature
350°F
350°F
Cooking Time
50 minutes
1h 10m
Convection
Yes
Yes

Baked French Fries

9.3
4.1
Pieces of baked french fries using a toaster oven inside an air fryer basket on a grey background.
Pieces of baked french fries using a toaster oven inside an air fryer basket on a grey background.
A close-up of pieces of baked french fries using a toaster oven inside an air fryer basket on a grey background.
Ten pieces of broken-up baked french fries are stacked on top of pieces of whole fries inside an air fryer basket.
Oster French Door Toaster Baked French Fries Test
Pieces of baked french fries using a toaster oven inside a silver grooved baking pan on a white background.
A closeup of pieces of baked french fries using a toaster oven inside a silver grooved baking pan.
Pieces of baked french fries using a toaster oven. Eight pieces of broken-up fries are stacked on top of pieces of whole fries inside a silver grooved baking pan.
Function
Air Fry
Turbo Convection
Temperature
400°F.
400°F
Cooking Time
15m
30 m
Convection
High
Yes

Design

Overall Design Scoring
9.3
6.7

In The Box

An oven rack, air fryer basket, rotisserie kit, lifter, the Instant Omni Plus 18L, user manual, box, and enamel baking pan.
Top to bottom and left to right are a blue box, the Oster TSSTTVFDDG Toaster Oven, one baking rack, one baking rack with supports, a user manual, and a silver grooved baking pan on a white background.

Exterior

9.5
8.0
A closed front of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven with exterior measurements on a white background.
A closed front of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven with exterior measurements on a white background.
The front of a closed Instant Omni Plus 18L 10-in-1 Toaster Oven has a control panel and the right has ventilation holes.
The back and left sides of the Instant Omni Plus 18L have air ventilation holes. The back has a power cord and two buffers.
The top of the stainless steel Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven on a grey background.
On a grey background, the bottom of the stainless steel Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven has two stands.
An closed front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The exterior is 16.75 inches long, 21.53 inches wide, and 12.79 inches high.
An closed front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The exterior is 16.75 inches long, 21.53 inches wide, and 12.79 inches high.
The front and the right sides of a closed Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The control panel is in the front. The right side has air ventilation holes.
On a white background, the back and the left sides of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven both have air ventilation holes. The back side has a black buffer.
On a white background, the top and the right sides of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven both have air ventilation holes. The control panel is in the front.
On a white background, the bottom of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven has four base stands and ventilation holes. The control panel is in the front.
Weight
25.4 lbs (11.5 kg)
16.8 lbs (7.6 kg)
Length
16.5" (42.0 cm)
21.5" (54.7 cm)
Width
15.8" (40.0 cm)
20.0" (50.7 cm)
Height
13.9" (35.3 cm)
12.8" (32.5 cm)
Material
Stainless steel
Stainless steel
Color
Silver
Silver
Door Handle
cool-touch
Cool-touch
Tray Indicators
Yes
No
Crumb Tray
Yes
Removable

Control Panel

The black touchscreen LCD of the Instant Omni Plus 18L Air Fryer Toaster Oven has 15 features and a master-control knob.
The control panel of the Oster TSSTTVFDDG Toaster Oven has an LCD and 15 flat buttons for Toast, Bake, Broil, Turbo Convection, Pizza, Warm, Defrost, Dehydrate, Timer, Temp, Clock, Stop/Cancel, and Start.
Type
black LCD digital touchscreen + one master-control knob
LCD + 15 buttons
Temperature
150°F - 450°F
150°F - 450°F
Timer
1 - 60 minutes
1 minute - 6 hours
Indicator Light
Yes
No
Status Bar
No
No
Light Toggle
Yes
No
Convection Toggle
Yes
No
Rotation Toggle
Yes
No
Automatic Preheat
Yes
Yes
Audio Cues
Yes
No

Cooking Functions

The eight cooking functions of the Oster TSSTTVFDDG Toaster Oven are in the center of the control panel. They include Toast, Bake, Broil, Turbo Convection, Pizza, Warm, Defrost, and Dehydrate. The oven’s right side has air ventilation holes.

Interior

9.5
7.0
The Instant Omni Plus 18L’s cooking chamber has 2 bottom heating elements, 3 guide rails, a rotisserie socket and bracket.
The Instant Omni Plus 18L’s cooking chamber has 2 bottom heating elements, 3 guide rails, a rotisserie socket and bracket.
The 2 bottom quartz heating elements of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven have guards.
The cooking chamber ceiling of the Instant Omni Plus 18L Toaster Oven has two quartz and one swirl nichrome heating element.
The cooking chamber’s right wall of the Instant Omni Plus 18L has four guide rails, a rotisserie socket, and a shining light.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one nichrome heating element on top and two on the bottom, two rack levels, a shining light, and a fan cavity on the right wall.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one nichrome heating element on top and two on the bottom, two rack levels, a shining light, and a fan cavity on the right wall.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one bent nichrome heating element on top and two straight ones on the bottom, two rack levels, a light, and a fan cavity on the right wall.
Two assembled guide rails on the right side of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven’s cooking chamber. A fan cavity is in between the two rails.
Heating Elements
4 quartz and 1 nichrome
3 nichrome
Convection Fan
Yes
Yes
Lighting
Yes
Yes
Tray Levels
4
2
Rotisserie
Yes
No
Safety Hook
No
No

Power Cord

A three-pronged plug power cord. In the background is the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
A two-pronged plug power cord. In the background is the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven.
Length
2.8 ft (0.9 m)
25.8" (65.5 cm)
Type
3-prong plug
2-prong plug
Power
1800 W
1500 W
Rated Output
120 V ~ 60 Hz
120 V ~ 60 Hz

Accessories

A stainless steel baking rack of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven on a grey background.
A stainless steel baking rack with two supports below of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack with two supports below of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
Length
12.4" (31.5 cm)
15.7" (39.8 cm)
Width
11.4" (29.0 cm)
16.1" (41.0 cm)
Height
0.9" (2.4 cm)
0.7" (1.8 cm)
Material
Stainless steel
Stainless steel
Dishwasher Safe
Yes
Yes

Build Quality

9.0
6.0
The front of an opened Instant Omni Plus 18L with a rack, a baking pan, an air fryer basket, a lifter, and a rotisserie kit.
The front of an opened Instant Omni Plus 18L with a rack, a baking pan, an air fryer basket, a lifter, and a rotisserie kit.
An oxidized slide-out crumb tray of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven on a grey background.
An opened Oster TSSTTVFDDG XL Digital French Door Toaster Oven on a white background. Inside the cooking chamber, from the bottom up are one removable crumb tray, one baking rack, and one baking pan under another baking rack.

Capacity

An opened front of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven with interior measurements on a white background.
An opened front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The cooking chamber is 15.75 inches long, 16.53 inches wide, and 10.04 inches high.
Length
13.8" (35.0 cm)
15.8" (40.0 cm)
Width
12.6" (32.0 cm)
16.5" (42.0 cm)
Height
8.7" (22.0 cm)
10.0" (25.5 cm)

Usability

Overall Usability Scoring
8.4
6.4

User Control

9.9
8.0

Easeof Use

8.0
5.0

Cleanability

7.0
7.5
Grease on the slide-out crumb tray inside the cooking chamber of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
Grease on the slide-out crumb tray inside the cooking chamber of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
The cleaned cooking chamber floor and 2 bottom heating elements of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
Brushing the stained upper quartz heating elements of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
A silver baking pan of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven with some stains on it on a white background.

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Behind the Comparison

Headshot of Alan Nguyen
Alan NguyenReviewer

Alan Nguyen is a writer and product reviewer at HealthyKitchen101. His major in English language teaching taught him to present concise information. In addition to his cooking hobby, he values the practical aspects of household appliances.

Headshot of Lap Vo
Lap VoTest Lead

Lap is Head of the Research, Testing, and Review Team (RTR Team) at HealthyKitchen101.com, where he directs and supervises the testing of kitchen gadgets and appliances.

Headshot of Tuyet Pham
Tuyet PhamProfessional Chef

Tuyet Pham is an award-winning Saigonese chef passionate about delicious and healthful foods. At HealthyKitchen101, she develops recipes and collaborates with our Research, Testing, and Review lab to evaluate the performance of cooking appliances. Her assessments add a strong authoritative voice to our product scoring process.

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