I've had EcoFactorThermostat for over a year, and the system in my house for about a year-and-a-half (used to have to log on to the computer to get it to work). EcoFactorThermostat has gone through several iterations, but the bottom line is that it doesn't work. I adjust the temp on EcoFactorThermostat , and it resets to what it was before. It is actually more of an energy waster than a regular thermostat because when you lower the temp manually on these, it resets after a few hours--so if you are gone for a week, you can kick your temp down for only a few hours of it. This is a five-star idea with one-star execution.