Let me start by saying I've tested my fair share of smart thermostats, and the Cielo Smart Thermostat Eco surprised me with its value proposition. The ENERGY STAR certification isn't just a sticker - I've noticed about 12% savings on my energy bills after two months of use.

The installation was surprisingly DIY-friendly. Like many reviewers, I didn't have a C-wire, but the included adapter made it a non-issue. The wiring diagrams were clear, though I'll admit I did need to snap a photo of my furnace connections for customer support (more on that later).

Where this thermostat really shines is in the app experience. Controlling my HVAC from bed when I forgot to adjust the temperature? Priceless. The weekly scheduling is intuitive, though I wish the vacation mode had more customization options for different trip durations.

Now for the real MVP: customer support. When I hit a snag during installation (turns out my 90s-era system needed some special handling), Jason from their team walked me through it via email with photos. He even followed up unsolicited to make sure everything was working - that's service you don't see often!

A few quirks to note: The touchscreen isn't as responsive as premium models when your hands are cold (hello, winter mornings). Also, while the energy insights are helpful, they're not as detailed as some competitors' breakdowns.

For under $100, you're getting remarkable functionality. It may not have all the bells and whistles of a Nest or Ecobee, but for basic smart control with excellent support? This is hands-down my recommendation for budget-conscious smart home beginners.