We have a Kitchen Aid combo micro wave/convention oven on top and a normal electric oven on the bottom. What I have spent in the eleven years we have had this combo I could have bought at least 4 new top of the line, microwaves. The door opens down so I have replaced 3 springs, a control panel, magnetron and now the outer door glass. The glass, for no obvious reason shattered in a thousand pieces. The control panel was under warranty but everything else has been out of pocket. When I called to see if there has been any known issues with the glass, I was asked about 20 questions, all designed to prove that the problem was my fault. Never again.