After 3 months the unit started throwing E9 error codes.  This indicates a bad controller board.  I am now waiting 3 weeks for the parts to arrive and rescheduling the repair appointment. The unit has been unusable for almost 4 weeks. I will say, however, then the unit is in working order it is very fast, efficient, and has unparalleled control over heat when cooking. [This review was collected as part of a promotion.]