We purchased this as a replacement for another GE microwave/oven combination wall unit.  This one has much less user-friendly controls.  Most functions take about 5 button presses, plus knob turning.  Our old one had very clear actual buttons, and most functions took 2-3 button presses.  It works fine, but learning to use the controls has been frustrating so far.  In ordere to figure some things out I had to read the entire manual.  for exmaple, setting the clock--there's a paragraph in the manual about the clock which tells you the clock functions, but not how to set them.  The fans in both oven and microwave are very quiet.  Unfortunately, the end of cycle beeps are also quiet.  I haven't used it yet, but I expect the proff funciton will be useful for me.