I've had a few since the mid 70s starting with a Toshiba 500 which had a single dial for up to 20 minutes iirc, 500 watts, no turntable. It was built like an Amana RR. A tank. Then got a Litton with defrost, no turntable,one power level. It worked really wel When I met Larry in the 80s and we got our first place we bought a full size GE with probe and auto cook, auto defrost, auto this and that, rack, still no turntable. THere were others in my collection , like a radarange etc, but we didn't really use those. We had the GE as our main mw for a long long time and I would say that it was probably the best performing oven of any I have ever used. It cooked evenly all over without a turntable, the auto cook and auto defrost worked perfectly. When it died I did bring up the Amana from the basement and we used it for a while but I wanted the counterspace for my mixer and the shelf in our cabinetry only holds a compact. I've had a little RCA $59 unit in there since 2010 which gets used umpteen times a day and it hasn't failed yet.