Well, this is the opinion of someone unrelated to cooking who got into the loop of air fryers. The device is quite simple to use. After you burn some foods and realize that it doesn't work as automatically as you expected, as I believe the same happens with other air fryers, then you will understand that it is a useful device but not magical. You put things, raw in oil glue, or in ready-made round oil glues, you put a little oil if you want your vegetables or potatoes to be eaten, and you check every 5 minutes to turn them so they don't burn. The downside is that due to the depth of the basket, turning is difficult.
Turning is everything in this device for uniform cooking.
I put a personal pizza and it burned on top and was raw underneath because it also needed to be turned. Potatoes the same. The burger dried out on the outside due to the fat and was good on the inside. What did it need underneath? Turning!
It is fast, it is economical because you don't turn on the whole oven, and it is noisy like a hood on the 2nd level. But it doesn't matter because you can also turn on the hood and it won't be heard...