Purchased this under the GE Employee Purchase Plan to replace our 35 yr. old GE microwave / wall oven combo. Family loves it, easy controls interface, good installation instructions. Had to widen existing cabinet face by 1/32" each side using jig saw. Once installed, the fit and clearances to either side were just right. Also, be aware the "perfect fit" refers to the unit width, not height. Once installed, there is a 5" to 6" height gap either at the top or bottom, depending on how the new unit is set vertically into the existing cabinet. I choose to mount it all the way up, leaving the opening at the bottom. I'll use that area for a shelf or something. It would be nice if GE offered cover plates or grilles to cover this opening. All in all, extremely happy with purchase. The new unit works great and is a pleasure to use. Stainless steel microwave is a beautiful design.