There are many other options for wifi stats. The nest is pretty cool and will work with your heat pump, either gen1 or gen2. With that said I don't like the learning set point thing of the nest. With heat pumps it doesn't save any energy using setbacks, especially dramatic ones like the nest tends to do on its own. I don't want any thermostat that thinks it knows what temp I want my house. Honeywell has a new wifi stat that's comparable in price. Ecobee make a neat one too.