It's pretty good though I wish it may be possible to custom-program how room sensors affect heating. Rooms heat up differently and for me it's important to stop morning heating when people bedrooms.
This thermostat with the remote sensor solved the issue we have in our home with every room being a different temperature. We installed the remote sensor in the coldest room (bedroom above the garage) and programmed the thermostat to read from that when we go to bed. The house is much more comfortable now. Installation was the same as any thermostat but we had a C-wire already so didn't need the adapter. Set up and programming was very easy. The app was tricky to install but I like the security, just wish it had a better design. I love the fact that you don't need a smart hub to connect and control this thermostat, all you need is WiFi and a smartphone. Controlling the thermostat remotely is a plus too. The price is a little steep but overall I'm happy with the purchase. I'd like to use more sensors but those too are expensive. If you don't have a need for the remote sensors there are cheaper thermostat options for you.
The T9 works ok but Xcel advertised it as eligible for their smart energy saving program - but it's not. No CRC code.. We also wanted the remote room sensor to help with a chilly room and that works as expected (after a good bit of trial and error).
This product required a Google account to work. I was not able to create an account unless I Created gmail account. I RETURNER THE THE THERMISTAT BECAUSE OF THE ACCOUNT ISSUES.