I have 3 liftmaster 8500s, 2 on insulated doors, one non-insulated. I really like them but have had all 3 control panels fail so far. One replaced for free, the other two I had to buy. When one of them failed, it opened the door without notification while we were away. Install was pretty straightforward, hardest part was running the wiring. The MyQ is nice. I ordered through a couple of different places that sold garage door parts, just did searches each time and the pricing seemed to vary a bit.