This microwave is very powerful (whole cup of coffee will get piping hot in under a minute, careful!) and has all the little functions working “correctly” as I’d expect them to. For instance: hit “add 30seconds” it will do so and start the microwave without hitting more buttons. Hit “Cancel” and it will clear the time AND stop the microwave without hitting more buttons. If the time has expired and the microwave is beeping, when I open the door, the beeping STOPS. Yes I have owned and used microwaves that do not work this way.