Our first microwave was an old Amana Radarange that my parents bought new back in the early 80's shortly after they came out. That thing was big and heavy and we used it for years before the latch on the door broke, which would cause the door to come flying open at unexpected times with the microwave still running. I probably sucked up enough radiation during that time I might have glowed in the dark :lol
Yes, its quite handy for heating up food. At one point, I even used it to cook things like eggs and noodles. But I use it more rarely now though since I just cook my noodles and oats with boiling water on the stove.