Our chain drive garage door opener was on the fritz, so my brother in law Jim told us to consider the Liftmaster 8500. Its really fantastic, quiet, no chain, slows down nicely at each end of travel, and its very quiet. It also is compatible with Mobile Apps, so now my ADT Alarm system and Garage door opener can be controlled from my phone.
I have to take down the old opener, tack the wires down and add in an AC outlet in a very convenient junction box that supports an outlet. The project took just a little over 2 hours – it was easier than a chain drive unit and I think so much better.