I am amazed at the versatility of this kitchen appliance! I expected it to handy, but I had no idea that it could be used as a food dehydrator, broiler, toaster, etc.! I am astounded at how quickly it heats up -- far faster than the larger oven I have used for so long! This device is extremely easy to use.  You simply press Function and select what you want to use it to do.  Options include Toast, Bagel, Bake, Broil, Air Fry, Dehydrate, Convection Bake, Roast, Keep Warm, Reheat, and Proof (for Dough).  It even has a meat probe attachment that can let you know the temperature of your steak, chicken, etc.  It also comes with several different racks that can be used with it. It will take me a while to learn and use all of the different functionalities, but so far, I have been very pleasantly impressed with this KitchenAid Dual Convection Countertop Oven with Air Fryer!