I have the T9 with 4 remote sensors easy set up , BUT I gave it 2 stars because it did not come with a mud ring or offset if you are replacing a larger in size thermostat and I have the thermostat is connected to a zone board connected to a geo unit there is no instructions for this option you have to figure that out on you own , no descriptions on the modes to help figure how this thermostat operates, not able to fine tune temperature set points like I want. Example I want a set point of 72 on at 71.3 and off at 72.4 to prevent on and off this is not good for a geo unit
If you have two of these at two different homes the weather will only display for the zip code you set up in the app. Otherwise it’s a great working thermostat
I have purchased the T9 and also 3 sensors. I really like the features of having the sensors so that I can target zones. I also like having access to the app to make changes to the schedule or check on things. What the APP and T9 is missing is historical data to see how the temp progressed through the day and night. When the heat was activated and when the heat was shut off so that I can see how often the furnace is used during the day and night. I can then use this data to adjust my schedule and temps so that I save energy.
I purchased two T-9 thermostats for our two-zone home. One with a sensor and the other without. My expectation was to integrate the system with Apple home kit. But at this time, it does not but as a back-up, we are using google home to monitor and control the temperature. Pros: 1. As a DIY person, the installation was very easy and took about 15 minutes each including setting up communication with wifi and the Honeywell app. 2. Setting up the app was very easy and scheduling cooling/heating times was very easy as well 3. Setting up remote sensor was easy as well as programming it to the app Cons: 1. Does not integrate with Apple homekit. (I should have read the installation instructions) 2. This one is my biggest con. The display never dims out. The display keeps a white backlight on when not on and keeps a bright orange backlight when activated. I guess it could be a Pro if you want to have a nightlight on 24/7. 3. No backplate provided as other models have. I had to get touchup paint to cover the 1/4" non-painted areas covered by the previous Honeywell Thermostats.
Overall, easy to install and works well with google smart home apps after converting from Home kit to Google assistant.