t9 with the single remote sensor is doing a fine job monitoring temperature for a greenhouse application and lets me adjust temperature to suit changing night time situations without making a trip out to the greenhouse.
It is already Returned to the store - it is utter garbage- didn’t work because according to not all Honeywell products connect to all other Honeywell products.
I haven't had this thermostat long enough to really rate performance although to date, it's working fine. I rated it high because it's so easy to install and connect to the internet.