Had this less than a month and have not tested all features yet. like it alot so far. The sensor in the microwave function works well. The controls take some getting used to. User must be alert to ensure correct cookware is used for the selected function. I.E. no metal in oven for microwave and fast cook functions; no plastic cookware in oven for baking mode, etc.  Spend quality time reading operating instructions!!!  This oven is spacious inside for a small oven and works well when baking on a hot day...it is fast and doesnt heat up room the way a regular size oven would. Happy with this oven so far.