I really like this thermostat and I would've given it 5 stars, but it disconnects from WiFi too frequently. It has great features. I have the Nest at another location, but I do like this better.
App issues. The device will loss connection to WiFi. The device stopped connecting to WiFi until an update was released. This took over 2 weeks. There are much better options available. I would not recommend.
The T6 wi-fi thermostat constantly drops from the homes wi-fi network, the units are within 10 feet of the router, and usually one of the two thermostats remains connected without any issues, so we know the wi-fi is not down.