We had a GE Profile countertop microwave with a built in wall kit that worked well for just over five years, until the magnetron began arching significantly. Of course that microwave is no longer available, and apparently, unlike ranges, refrigerators, and dishwashers, microwave ovens are not built in standardized sizes. So we were stuck with one choice and one choice only. The good news is that our only choice is a very nice, though expensive, appliance. The current version of this appliance will not work as the top display section of the unit is now over an inch taller making it so that the top cabinet doors will not allow that unit to fit, which really sucks because that is the unit we really wanted. If these items are going to be called “built in” then they need to be standardized for cutout and trim dimensions. GE, are you listening? Thank you MJ’s for being such a wonderful, professional and helpful dealer!