So far the preset cooking temperature and time for each item has worked out perfectly. Our food is cooked in record time and each dish has turned out delicious! This is a well built oven and very easy to clean. With record temperatures this summer, I'm not heating up the kitchen or using so much electricity with the stove. I can't wait to cook a rotisserie chicken in it, our favorite dish. I really am thankful I purchased this air fryer and I think the only thing could make it better is if a recipe booklet came with it.