Product review (4 stars): Buttons stopped working
This unit installed easily and looks great (except for one small dent in the duct cover). It worked fine for one day. Then the buttons all stopped working. I have contacted the seller. I'll see what happens.

Update: No response from the seller.  When we used the cooktop for an extended time for Christmas the heat made the buttons release and it started working. Apparently the buttons stick against the hood when it is at room temperature. I will try taking it apart and adjusting the button location.

Feb 2014 update. Contacted Amazon for return of unit and they got seller to send me a new button unit. Hood now works great! Raised my review from 1 to 4 stars.