After lighting up panel, you have to push 2 "start" buttons to preheat (to standard 350). Does not seam practical to have a second pushing of another button. When timer shuts off when baking, so does oven! Old oven let me increase the time w/o starting the oven over.   It has air fryer, but no rack. Seriously ?? The 3rd rack that slides out does not fit on all the levels. I like the mid rack to be free and clear of other racks.  Its not even necessary to have a slider rack. Just pull out the rack a bit. So it gets stored in basement. Would rather have 3 regular racks that fit on all levels! One review said the panel was smudge proof. They must never use the oven.  The oven seems to bake my cookies and chicken fine. Bought this model as it was on sale and was available in one week. Hard to know some of these things until you use the oven!