1. There is no subscription.

2. I paid less than $200 for it.

3. The device lets me control the thermostat remotely. I can turn on the heater when coming home from a trip, or turn it off if I forgot when I left.

4. I can just say "Hey Google, turn up the heat" out loud.

I don't care if Google knows about the temperature of my home. I absolutely would buy the product again.