It's a thermostat. Received the T6 with my new home. Came from having an Ecobee 3. While there is absolutely nothing wrong with the T6, the Ecobee is far superior.
The T6 thermostat looks beautiful and certainly meets the basic needs of one desiring a programmable and smart thermostat. We recently upgraded our heat pump and received this thermostat as a replacement to our old Honeywell programmable thermostat. My main interest in these types of thermostats is to have the ability to track usage. Our former thermostat (~20 years old) displayed usage time at the touch of a button. I stumbled onto the fact that the T6 also tracks Runtime through the Resideo app. Unfortunately, it is not updated in real time like my former thermostat. The information is always 24+ hours old. Having this feature is better than nothing, I suppose, but not ideal.
Great Thermostat that is loaded with features. We had this unit professional installed, and it has been a great experience. I strongly suggest that you have a professional install this item. Before our install, I considered installing, as I have a background as a computer hardware and office equipment Tech, but after reading the install manual it was clear that it would not be wise. Every industry has their own language, and the HVAC industry is no different. At the end of the day, I'd rather invest in having a professional HVAC tech install this key component.