Earlier quoted context omitted.
I would reduce it to one dial. Two dials is too much.
I have a microwave with one dial. Best microwave around. Nobody can get confused about how to use it. There's not even a turntable so it holds more food and it's easy to clean. That's the Sharp R21LCF for ya.
With the door closed, turn the timer to the desired time. Oven will begin operating immediately. To shut oven off manually, return timer to 0.
It's almost as if they have to help people unlearn the crap they're used to with button microwaves wondering "Where's the start button?" and "Where's the cancel button?"