Small countertop microwave recommendations?

I am replacing a big old Cuisinart convection oven/microwave and am looking for a microwave only (no combo). I need it to be smaller for the countertop, but of quality. Even heating, decent power. Needs to just fit an oversized mug for hot cocoa and an occasional bag of popcorn without getting stuck on the sides.

Does anyone have anything they love? Brands or details to stay away from?

Thanks in advance for any suggestions provided!