I finally decided to test the popular flip-up air fryer that promises to save space. This Ninja SP351 review comes after weeks of daily cooking in my own kitchen. It is an oven-style cooker built for people who want crispy food without losing space. The dual heat feature makes it feel like a true mini oven rather than a basic basket.
My overall opinion is mostly positive, but it has a few quirks you should know. It is perfect for busy families who need fast dinners every single night. The smart thermometer takes all the guesswork out of cooking meats. Let us look at what everyday cooking with this machine actually looks like.
Quick Verdict
| Category | Verdict |
| Best For | Small kitchens and fast weeknight dinners |
| Not Ideal For | Cooking whole large chickens or tall baking pans |
| Biggest Strength | Flips up to save massive counter space |
| Biggest Weakness | Inside ceiling is hard to clean near the heating tubes |
| Overall Rating | 4.5 out of 5 Stars |
Unboxing & First Impressions
Taking this air fryer out of the box showed me it is heavy and solid. It feels like a very premium appliance right away.
The packaging was secure, and the oven has a sleek silver finish that looks great. It weighs over 20 pounds, which surprised me. I noticed a faint plastic smell when I first plugged it in. That smell faded after running a quick empty bake cycle. The short cord means you need an outlet very close by.
The best part is easily the flip-up design. It takes up a large space while flat. Lifting it up against the wall frees up huge amounts of room. The basket feels sturdy, and the digital display is bright and clear. It makes a fairly loud beep when you press the buttons.
Ninja SP351 Review: Cooking Performance
This is where the oven earns its higher price tag. The dual heat technology gives very even cooking across the pan.
Frozen Fries
I cooked a big batch of frozen fries at 390°F for 15 minutes. They had a perfectly crispy texture, but the back corner got darker. You must give the air fryer basket a quick shake halfway through. There was no smoke, and the fries tasted perfect.
Chicken Wings
Using the air roast setting, I cooked chicken wings at 400°F for 22 minutes. The smart thermometer kept the meat juicy while the skin got crispy. Grease dropped down onto the hot pan perfectly. I did notice a slight grease smell in the kitchen after cooking.
Reheating Pizza
It is perfect for reheating leftovers late at night. Four minutes at 350°F brought the pizza back to life. The crust got crunchy again, and the cheese melted evenly. It beats the microwave every single time.
Toast
I make toast every morning, and this machine fits plenty of slices. The middle slices toast slightly faster than the edges. It takes about four minutes using the basic cooking presets. It is faster than my old toaster but requires watching the first few times.
Real-Life Daily Use Experience
Living with this air fryer is very easy. It quickly becomes part of your daily kitchen routine.
The preheat time is incredibly fast and takes under one minute. I love the fast cooking on busy weeknights. The buttons are simple to use. The bright display stays on for a bit after cooking ends. Handling the wide basket requires two hands, so grabbing a plate is tricky.
Grease management is mostly okay, but oil collects in the pan corners. I strongly suggest using parchment liners for messy foods. One small annoyance is the heat coming from the side vents. You cannot keep bread near the sides while it runs. It helps to clear the area before cooking.
Design & Build Quality
The build quality matches the higher price of this machine. It uses metal parts that feel much nicer than cheap plastic.
| Feature | Observation |
| Materials | Brushed stainless steel |
| Handle | Very sturdy, no wobble |
| Screen | Responsive touch buttons |
The metal finish looks premium but catches fingerprints very easily. I have to wipe down the front handle often to keep it clean. You save permanent countertop space when it flips up. It sits perfectly flat and never wobbles when you open the heavy glass door.
Air Fryer Noise Level
The sound this machine makes is loud. It moves a lot of hot air very fast to cook food.
The fan is loud while cooking. It sounds like a strong microwave fan or a stove hood. You can still talk in the kitchen, but you definitely notice the air fryer noise. The rapid air technology is powerful, which explains the loud sound. The noise blends into the background after a while.
The loud beeping sound is my biggest complaint. It beeps loudly when it preheats, changes settings, and finishes. There is no way to turn the volume down at all. If you make a midnight snack, the final beep might wake people up.
Cleaning & Maintenance
Keeping this oven clean requires quick attention. Washing it right after cooking greasy foods makes the job very simple.
| Part | Cleaning Method |
| Air Fry Basket | Dishwasher safe |
| SearPlate | Hand wash recommended |
| Crumb Tray | Slide out and wipe |
Food rarely sticks to the nonstick coating if you wash it promptly. The hardest part is cleaning the inside corners near the top heating tubes. Grease splatters up there during cooking. The flip-up design makes reaching those top spots slightly awkward.
Pros and Cons
Every kitchen appliance has strong points and flaws. Here is an honest look at what works best.
| Pros | Cons |
| Folds up to save counter space | Inside ceiling is hard to clean |
| Cooks food very fast and evenly | Buttons have a loud beep |
| Smart thermometer removes guesswork | Too short for whole chickens |
Comparison With Similar Air Fryers
I have used a few different air fryers over the years. Comparing this oven to a standard basket model helps show its true value. Let us look at how it stacks up against a common basket style.
Ninja SP351 vs Ninja Air Fryer Max XL
The basket style is taller, but the oven style is wider. The cooking space feels very different.
| Feature | Ninja SP351 | Ninja Air Fryer Max XL |
| Cooking Space | Wide and flat | Deep and round |
| Storage | Flips up against wall | Sits flat on counter |
| Cleaning | Requires wiping inside | Just wash the basket |
The basket model is easier to clean quickly. However, the oven style cooks flat foods much better.
Who Should Buy This Air Fryer?
This machine is perfect for some kitchens but wrong for others. Your cooking habits matter greatly.
Buy This If:
- You lack permanent countertop space
- You cook wide meals like pizza or fish
- You want very fast preheat times
Avoid This If:
- You cook tall foods like whole roasts
- You hate cleaning the inside of ovens
- You are on a strict budget
Long-Term Durability
After heavy use, you start to see how an appliance ages. So far, the machine holds up very well.
The nonstick coating on the tray remains fully intact. I only use soft silicone tools to prevent scratches. The front handle is still tight, and the flip-up hinge shows no signs of getting loose. The display buttons look brand new without any fading. I expect a lifespan of several years if kept clean.
Energy Efficiency
Using this small oven saves a lot of time. It also keeps the kitchen much cooler than a regular stove.
It draws 1800 watts, which is high, but it cooks so fast. The total electricity usage feels minimal. It is highly efficient for cooking small meals for two people. You do not waste energy heating up a massive metal box just to bake simple chicken nuggets. I find it totally worth using daily.
Final Verdict
My final thoughts come down to simple daily convenience. This machine completely changed how I make my quick meals.
The Ninja SP351 review process proves it is an excellent air fryer. It works best for anyone who wants great food without losing counter space. Its main strength is the flip-up design, paired with fast cooking times. The smart thermometer is a great tool that ensures perfect meat every single time.
While cleaning the inside top is a small hassle, the good points win. It easily replaces my toaster and my older air fryer basket. It even replaces my main oven for small meals. If you cook lots of flat foods and daily toast, I genuinely recommend it.