LiftMaster by Chamberlain 315MHz Wireless Keypad 377LM - Secure Keyless Entry System for Garage Doors - Perfect for Home Security & Convenient Access

2 YEAR UPDATE JAN 2013The 377LM retains my 5 star rating. This unit has survived daily use by two adults and three small children at my son's house. That's quite an accomplishment considering the builder-supplied indoor control was demolished in a year.ORIGINAL REVIEW DEC 2010While this is a preliminary review based primarily on installation and initial operation of the 377LM, I have several months experience with the similar 376LM as well. This new unit was for my son's house.Installation of the 377LM took about 15 minutes, some of of which was spent carrying and setting up a ladder to reach the Learn button on the motor-mounted receiver.The unit came with a 9V battery installed. Setup went flawlessly following the simple well-written instructions.1. I pushed the purple Learn button on the receiver (behind the lamp cover on my unit).2. I entered a four digit code of my choosing on the 377LM keypad.3. The motor unit responded with two clicks indicating success.4. I tested operation by again entering the code and pushing Enter. The door moved appropriately. I pushed Enter again and it stopped. Once more and it reversed.5. I mounted the unit on the wall near the garage, using the two screws provided and tested it successfully again. I was done.The buttons on this unit appear a bit more robust than on the older 376LM that I have been using. The 377LM's buttons are a little rounder and appear to be less prone to getting stuck if pushed sideways. I had no problems at all with the buttons on this unit. A nice improvement on an already good product. My 376LM has been operating without problems for several months. I expect the 377LM will be as reliable.