This replaced a 36" model JVM3670SF. Installation went OK; issues had nothing really to do with the unit or the filler kit for the sides. Looks good. This model is only 1000W whereas the old one was 1100W. The difference has been apparent in cook times. The old one had a numeric keypad that gave quick access to express cook times. The new one has no such keypad and requires multiple actions to enter cook times. The dial entry works, but a numeric keypad makes custom time settings easier. If I had it to do over, I'd look more carefully for one with the numeric keypad. GE does make them. Recommend with reservations.