It takes five minutes to bake a medium-sized potato in the microwave. About 2.5 minutes, flip it over, then 2-2.5 more minutes. I always butter the skins, then pierce the potatoes on both sides and the ends with a fork or a sharp knife to allow the steam to escape.
They CAN overcook, but they never burn.
Yeah, but it takes a lot longer to cook ten of them in the microwave!