I can't agree with the other reviews. It took ten minutes to install, and it took another 10 minutes to program. The instructions are easy to follow. What I really like is the remote room sensor, I placed it in the master bedroom as it is on the 2nd floor and it is warmer in there than the location of the thermostat, so the temp. is set by the sensor which is great. Another great feature is the auto system mode. I have been looking for one of these for years in a programmable format. Finally, Hunter did it, and I love it. Just set it and forget it! I would definately recommend this to everybody. Thumbs up!