the GE Mechanical Air Fryer is super simple to use . 3 Knobs Mode, Temperature and timer.
the Air fryer mode makes perfect tater tots , nice and crispy with no added oil.  the Bake mode is perfect for a small batch of cookies.  rather than heating up the big oven for small dishes or as an additional oven , this works great.  the only down side is if you go too far on the timer there is no way to turn it back  so get it right the first time