Let me start by saying this thermostat is a game-changer for home heating efficiency. After a few days, it literally learns your temperature preferences like a thoughtful roommate. I saved about 15% on my energy bill last month - that's real money!

The room sensors are brilliant for uneven homes. My bedroom used to be an icebox while the living room roasted. Now I can prioritize which sensor controls the temperature. No more midnight Arctic expeditions to adjust vents!

But here's where Google dropped the ball - the sensor scheduling is ridiculously rigid. When my work schedule changed and I needed different temperature zones at odd hours? Forget about it. The predefined time blocks (7-11AM, etc.) feel like they were designed by someone who's never had a sick child or worked night shifts.

The connection issues are frustrating too. Twice now I've woken up sweating because the bedroom sensor stopped communicating overnight. And that 'alert' system? More like a belated apology - 24 hours later is useless when you're already uncomfortable.

Installation was smooth if you're replacing another Nest (YouTube helped), but friends without C-wires had nightmare experiences despite claims it would work. Mine occasionally needs rebooting like a temperamental computer.

Bottom line? If your life fits Google's perfect schedule mold, it's magical. For real-world flexibility? You might want to keep shopping.