Let me start by saying this thermostat saved me from basement temperature guesswork. The Wi-Fi connectivity is solid, and pairing it with Honeywell's remote sensor (sold separately, ugh) lets me monitor my tenant's apartment like a hawk. I caught a drafty window issue before they even complained – landlord win!

Installation? Surprisingly DIY-friendly if you're replacing an existing Honeywell. The mounting plate is identical, so it's literally a 'pull-and-snap' job. Pro tip: That pesky C-wire is non-negotiable here. My installer had tucked it behind the wall – had to fish it out like retrieving a lost AirPod from under the couch.

Now the app... oh boy. The Resideo transition feels like when your favorite coffee shop rebrands – same mediocre brew, just with glitchier lids. My thermostat developed a personality disorder after the firmware update, randomly switching to AC during -25°F winters. Imagine waking up to your furnace blowing cold air because the app thinks you've moved to Miami.

The run-time data feature is brilliant for energy nerds like me, but why does it take two days to update? It's 2023 – my toothbrush syncs data faster than this. And that 'performance issues' banner? It's like having a check engine light permanently stuck on your dashboard.

For basic heat/cool control, it's reliable. But if you want smart features that actually work smartly, you might want to consider that Google Nest my neighbor won't stop raving about. This Honeywell feels like a gifted student that keeps forgetting its homework.