Works great. Based on a previous review, I replaced an existing T4Pro that the renovator had installed with a T6Pro. I wanted the convenience of WiFi access and scheduling but wanted to retain the compatibility with my HVAC system. The T6PRo was perfect and no additional wiring was required. Simply unplugged the old unit and plugged in the new one! Now, via internet I have access from anywhere. And scheduling is much easier than the old T4Pro.
There is nothing Pro nor smart about it. No auto mode for heat AND a/c, it's one or the other. 39 degrees at night and 79 during the day? Tough luck, sweat or freeze unless you change it manually. Don't forget when you go to bed or wake up frosty. The interface is ugly, period. Buy a Nest its cheaper. Buy an Ecobee, it's better. If your going to name it Pro smart, it should be Pro smart.