Ninja
Foodi Dual Zone Series
Dual zones for smart cooking, but baskets are small.

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Go with the Ninja. Ninja makes consistently good quality that lasts years
Try this double stack air fryer by ninja. Looks very cool, takes less space. Plus it has some functions which genuinely surprised me - like you can cook four different kinds of food at one go
Ninja double stack has been a cool addition to my kitchen. The sync function is super cool and it fits right into my tiny Mumbai kitchen
I have tried various brands and I prefer ninja. I treated myself to one of the vertical stacked double basket ones recently and love how little space it takes. Technology Connections on YouTube does a good video on the different styles and concludes that the basket style performed better than the toaster oven style.
We have the Ninja Double Stack XL and love it. We use it more than the oven at this point. We pretty much only use the oven if it's something too big for the air fryer, like a large aluminum roaster.
Wir sind mit ner günstigen vom Aldi (glaube so 70€) angefangen um zu schauen ob es was für uns ist. Mittlerweile haben wir (auch zu Zweit) ne Doppelstock als XL von Ninja. Mit zwei Schubladen kann man gleichzeitig zwei verschiedene Sachen wie z.B. Hänchenschenkel und Gemüsebeilage machen. Ich würde immer darauf achten, dass man die Programme so einstellen kann, dassselbst bei unterschiedlichen Garzeiten beides gleichzeitig fertig ist. Und nie wieder zu klein, die Heißluft muss sich vernünftig verteilen können, sonst ist das Ergebnis schnell entäuschend.
Ninja
Foodi Dual Zone Series
Dual zones for smart cooking, but baskets are small.

COSORI
Turbo Blaze 9-in-1 6QT
Quiet, easy to clean, but lacks a viewing window.

Ninja
Foodi Air Fry Oven Series
Flips up to save space, but shallow and air fries poorly.

Breville
Smart Oven Air Fryer Series
Oven replacement; spacious, but air frying and cleaning divide users.

Typhur
Dome
Self-cleaning and quiet, but expensive with shallow interior.

Ranked #1
Ninja - Crispi Pro 6-in-1 Countertop Glass Air Fryer

Ranked #1
Breville - Smart Oven Air Fryer Series

Ranked #1
COSORI - Turbo Blaze 9-in-1 6QT

Ranked #1
Ninja - Crispi Pro 6-in-1 Countertop Glass Air Fryer

Ranked #1
Ninja - Foodi Air Fry Oven Series