Note: before you even read this article, you might want to make sure that an Ecobee3 thermostat is compatible with your current thermostat setup; check Ecobee’s compatibility checker (takes about 3 minutes).
Ecobee3 Review: The Good
Room sensors: The Ecobee3 brings a whole new dimension to energy efficiency and control with its room sensors. The Ecobee3 room sensors let you tailor your needs based on the amount of people in the room. If nobody is in the room, focus energy elsewhere and save your wallet. And based on this feature alone, we’d recommend purchasing the Ecobee3. The downside? The thermostat/sensor package comes only one sensor; you’ll have to buy Ecobee3 room sensor packs seperately.