I bought the thermostats because of the good reviews. The installation was very simple. After about a week began one of the thermostats on apparently "regulate" wrong and bullerte at the highest temperature. The heater was extremely hot and degrees in the room at least 35. I then removed the thermostat and the batteries removed after regulating the temperature was not possible. (Display funk-oriented and the temperature could be visually change, menu was also available to the heat in the room but nothing happened) The same was happening then in two other rooms independently of the first incident, on other days and in other rooms. Only reconnect the entire managed Remedy. Will watch the whole on. If the error occurs again, I will send the thermostats back, so I spare no heating costs, but it still pays.
