This is a replacement for a previous GE in-cabinet microwave.  The bake and speed  cook feature set is new to my wife and I, thus we are still learning the appropriate situations for best use.  The microwave function works well and is easy to implement.  So far, it's very nice.  I do wish that the glass tray required for the microwave function would be safe for oven usage.  Oven quality glass has been around a long time.