The thermostat work well. Simple - easy to use. However, the WIFI app setup instructions were, for me, very confusing. There is a complex process of putting your phone in "airplane mode" (called something else in the instructions - which is confusing) and communicating to the thermostat to program it from your phone. Finally got it to work, but took a couple tries. Also, there apparently is no Web Option for connectivity (i.e., going to a website to control the thermostat - only the app on a phone. Different from other products.