Works exactly as advertised! I could not find a heating and cooling thermostat that can be set below 50 degrees. I have a mountain cabin where I like to keep the temperature just above freezing when I'm not there. I messaged ICM customer service and they emailed me very simple instructions to replace it with my other thermostat. I checked the temperature with another thermometer and this thermostat keeps the cabin right where I set it. It saves me a lot of money every winter.