After 10 days of use I am completely dissatisfied.  

(This unit was purchased to replace  another GE unit that worked fine but had the notoriously well publicized flaking paint in the microwave ceiling interior.  GE customer service suggested I replace the unit because the paint was non-toxic but suggest that it not be ingested.)

 This new unit has volume control for the tone but its only options are "mute" and "normal".  The cooling fan runs way too long and if food is not removed immediately the fan continues until the food is cool. The touch controls will lock for no reason and the unlock feature intermittently will not work and resetting the circuit breaker is the only way to unlock controls when this happens.  There are several other problems but these are the most significant.