Product installed had some wearing and stains on the back wall we cannot clean.  It appears it was used before installation to a new home.  The dial is junk.  It does not always catch and just spins around, we have to push or hold it to get it to actually change the settings.  
The unit is deep which is great for many things, but to clean it you need to get higher to reach past the door to the back to clean completely without putting pressure on the door where it would fall off.   
The clock does go off when not in use and that is annoying as i depend on this in my kitchen.  I haven't figured out yet if you can adjust the preprogrammed settings, the popcorn setting is not enough to pop a bag completely - i end up having to add 60 seconds while it's still cooking.