I really like everthing about the functionality of this oven. The problem I have is it heats up to 350 quickly but then drops down to 300 for almost 30 minutes. Then finally it heats back up to 350 and works fine for the rest of the cooking period. I am a HVAC repairman and have very accurate measuring equipment. I have repeated the behavior every time I use the oven. I have only had it a month and am working with the dealer hopefully to find the exact problem. I have only see on other review like mine. The rest seem good