This unit came with our new house.
We've used microwaves for 40 years and they've always been trouble-free and easy to use. This one stops working from time to time and we have to re-set the breaker for 2 minutes so the mv re-sets itself (then re-set the clock). 
You have to punch the microwave button first, then you can only select times in 15 second increments, press Cook and then the buzzer is too quiet to know when it is done.  They've tried to make them too fancy but mess up the reliability and made them overly complicated.