Took a bit (had to locate and download the Install Guide), but once I got the TEMP OFFSET adjusted and turned on AUTO CHANGEOVER, the T6 is great, and it's super than I can turn on the A/C from my cell phone on hot day before I go home.
This is a fantastic option for living in NW Ohio. Cold mornings that lead to hot and humid afternoons (and vice versa) make the ability to control the thermostat from my phone a luxury I never knew I needed!
If you're thermostat is registered and for some reason it loses its wifi connection, establishing that you're the owners requires you to call in and have them unregister your thermostat from the account and then you need to connect once again.