What HVAC equipment do you have? The only thing that keeps me from switching right now is that my HVAC setup works with the ecobee3, but I would lose functionality if I switched to any z-wave/zigbee thermostat.
I have a 2-stage heat pump with 2 separate AUX heating sources (so I use R, C, G, W1, W2, Y1, W2, and O/B terminals). After seeing how nicely @waynespringer79 has setup his Zen, I really wanted to replace my ecobee, until I found out that I would lose one of the AUX heat (W2).
