
Appearance
4.7/5
Overall performance
4.7/5
Packaging
4.6/5
Shipping
4.7/5
Reviewed 11/06/2026, Germany.
The Ninja Air Fryer arrived earlier than expected. The packaging was neat and the appliance was securely packed in non-original packaging. The appliance itself looks brand new and I couldn’t spot any signs of wear. I can’t think of anything that could be better on a new one. The only drawback is the missing instruction manual, which you can’t even download from Ninja. It only refers to the basic model, not the one with the smart cooking function. But there’s nothing to complain about as the price is really good value. I’d definitely recommend it; I’d buy it again in a heartbeat.
Translated from German
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
23/05/2026
Reviewed 04/01/2026, Germany.
Ninja works perfectly. There are no signs of use. However, the operating instructions are not the same as mine. As I don't have a control knob, I had to google it first. The frying temperature for the fries is also fixed and cannot be changed. I also had to do some research first. I'm still in the trial phase. Ninja is currently in daily use.
Translated from German
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
22/12/2025
Reviewed 10/06/2026, Italy.
I am extremely pleased with my purchase. The air fryer arrived in impeccable condition – practically as good as new, in perfect working order and with all parts included. Its performance has even exceeded my expectations: it cooks evenly, is intuitive to use and allows you to prepare excellent dishes quickly. It also looks in excellent condition. The shopping experience was very positive, with prompt delivery and a product that matched the description perfectly. Buying refurbished proved to be an excellent choice both in terms of value for money and quality. I highly recommend both the product and buying through Back Market, where I will continue to shop many more times
Translated from Italian
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
24/05/2026
Reviewed 05/01/2026, Germany.
Easy to order, dispatched faster than expected and the device is in top condition (like new, only without OVP). Works perfectly and is perfect.
Translated from German
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
22/12/2025
Reviewed 10/06/2026, Germany.
Everything went really well 🤝 I'm very happy
Translated from German
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
25/05/2026
Reviewed 30/05/2026, Germany.
great product without visible defects, super packed, fast delivery, gladly again
Translated from German
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
21/05/2026
Reviewed 28/12/2025, Germany.
Thank you very much 💕 for the great work, I am thrilled and fully satisfied, thank you again for the good performance, I and my family wish you a healthy and happy new year, and thank you again
Translated from German
Ninja Double Stack XL SL451EU
Ninja Double Stack XL SL451EU
Condition
Good
Purchased
15/12/2025
10300 gWeight
9.5000Volume (L)
NoBluetooth
2470Power (W)
Double Stack XLSeries
NinjaBrand
GreyColour
SL451EUModel
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