Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Watch out for the bake mode!!!

Had the unit only a few days. Everything seems nice, but there's no preheat option, and the bake mode uses the upper element. I went and got another thinking that the first was defective, but they both do the same thing. The top elements are bright glowing red, and the bottom are just a tiny bit red. So you open the door to insert food, it cools off, and the top element burns your food. Completely unacceptable. And it's not just while the unit is getting warmed up; The bottom elements never got more than a tiny bit red, while the tops were glowing, this even after it was on for an hour. Now I have two returns, and some more shopping to do... :-(