My service technician, Elijah Bowman, was excellent! Listened to me explain the problem, had experience with the type of problem I had, and as a result was able to quickly troubleshoot and diagnose the problem and offer two possible solutions, repair or replace my Liftmaster unit. I chose to replace, and he was prepared by having the replacement unit I needed on his truck. Elijah made short work of the repair and gave me a complete explanation of the operation of the unit and all the back-up and spare parts that he left me with. I really appreciated his professionalism!