i received the stainless smoker with the view window for Christmas.  I have used it about 8 times with acceptable results.  This weekend I started to preheat before smoking a Ham. Unfortunately,  during the heating process,  the unit kept blowing my circuit breaker. Obviously there is an electrical problem with the unit. I called Customer service only to receive less than helpful information.  I guess its back to the Caveman style.  Masterbuilt needs to up their game!