While it still functions and we like the look/features/etc. within a week, it started acting up... the fan turned on for no reason when no one was around it... TWICE.  Both times the only way to turn it off was to unplug it from the wall.  A hard thing to do with a built in with no access panel.  The second time this happened, the clock stopped working.   We are awaiting the repairman to diagnose.   While the unit still functions it is not a confidence-builder to have such a thing happen within the first month of installation.