I bought this product 3 years ago.  Since than I had to replace the heating element and the electronics because the electronics is placed in the bottom part of the smoker, so water from cleaning the interior of the smoker seeped into the chamber of the electronics.    
Also, from the beginning it did not ignite the wood chips, so I got rid of the box and place the wood chips directly on the heater.
the probe stopped working almost immediately
The smoker itself is very well designed, easy to use, the heat is very well controlled and I use it frequently.  I wish it would turn itself off automatically.