The device and some features are ok compared to Ecobee or Google Next, but it is not compatible with all systems, and crazy enough, if you have an AC and Heating system, it only seeks the C-wire coming out of your AC. I have all my C-wires coming out of my heating system. It goes blank every time I connect my AC to it - Unfortunately, that is not written anywhere clearly, and I had to learn from the experience after investing a ton of money on what should be a simple swap job from my old, not smart Honeywell device - save yourself some time and money and get something else.