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

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First edition InstantPot big air fryer has worked well but broke the tray. 2nd gen with the stainless face is a little beefier so I’m hoping it continues. Zero issues so far.
I have the Instant Vortex Plus 6-qt single basket. Cooling for one, sometimes two. It is the perfect size for me. It is one of the most frequently used items in my kitchen.
I'm on my 3rd AF. My first was an Instant Pot 6QT VORTEX Plus and the 2nd was an Instant Pot Vortex Plus 6QT ClearCook Air Fryer, Clear Windows. The 1st one was OK. I really didn't care for the one with clear windows. It just didn't seem to get as hot as the 1st one. I now have a Cosori Air Fryer Pro, Compact 5QT, Ceramic Coating. It gets up to 450ºF unlike the first 2 which maxed out at 400ºF. BTW I don't use the presets. I just set the temp and time myself.
I’ve had my air fryer for 2 years and it has not changed for me. Instant vortex plus 6 qt.
I haven’t that much Air Fryer experience but I’m very happy with the 6 qt Instant Vortex Plus. I hardly use my oven anymore.
I'm pretty happy with my Instant Vortex Plus. The one with the window is $89 at Amazon. No app.
I bought one back in July and since I unpacked it I haven’t used my oven once. There may be better ones but it’s worked well for me. I like the dial to change time and temp.
1. For basket fryers cleaning the basket is going to be the same everywhere. Remove the grill and clean both separately. The only difference is whether the basket/grill are non-stick or dishwasher safe. 2. Parchment paper defeats air flow and therefore the purpose of an air fryer. In addition for foods which give off a lot of fat, such as chicken legs, the food would be lying in a pool of fat on the parchment paper. You want the fat to drain in order to crisp the food. 3. Top reviewed is Instant Pot Vortex Plus 6QT. Not the most robust unit out there. Support and parts can be problematic. The unit will likely last as long as the non-stick coating does. Non-stick coatings or all cookware has a limited life.
There have been many posts searching for a "non-toxic" air fryer. Don't really understand it. I am extremely chemically sensitive but I have absolutely no problem with teflon coatings. Haven't seen any posts about health issues with teflon with their air fryer other than the obvious ones such as the coating failing. Top reviewed fryer is the Instant Pot Vortex Plus 6QT. It is relatively cheaply made so the LCD display is failing but I can still use it. Double baskets have limitations. The Breville oven style is a high quality expensive product but not as good at air frying.
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