Never been used. Everything is still in the box. Paid about $350 for it only to realize my current thermostat has the function I wanted already.

From Amazon:

Save up to 26% annually on heating and cooling costs (compared to a hold of 22°C)
Included SmartSensor extends comfort to your most important rooms
Comes with Siri and Alexa Built-in for calls, music, and added control (Apple HomePod mini required to enable Siri)
Automatically pauses your heating or cooling when a door or window is left open (requires ecobee SmartSensor for doors and windows and a Smart Security subscription)
Named “Best Overall Smart Thermostat of 2021” by CNET in May 2021
Integrates seamlessly with your preferred smart home system