Just replaced our furnace with a heat pump and this NEST is up for grabs. Excellent, intuitive product; going to miss it. Love the fact you as you walk by it lights up and gives you the outdoor temp and weather condition in a little graphic. Also smart controllable, however, rarely used that as it did its own thing based upon learning our living habits and scheduling the temps/times. Controllable from your phone so you can heat up the house when travelling home if super cold or turn on the fan, etc... Or, if you knew you were out longer or overnight you could turn the temp down to save money. It is one of the best and practical uses of technology for your home.