We bought this microwave 7 months ago. We had professional installation and use the microwave daily. The different functions are useful, especially the auto defrost and the sensor cook. I like the +30 seconds for short heating or to add time to one of the presets. Turning off the sound is easy; then we don't disturb one another when on different schedules. The extendavent is helpful when we use the range top that we have below.