In the spring of 2022, we discovered that the Nest Learning Thermostat was not operating the reversing valve. It had been fine in the fall. The Nest energizes the reversing valve to cool. Come May and time to cool it wasn’t. Oh, and the fall update stomped on the heat pump lockout setting. So the proprietor fired Nest and hired Ecobee.
Church uses a large number of Ecobee 3 Lite devices with extra area sensors and has found them to work well. So Dismal Dave bought one and installed it. It set up easily enough for heat pump operation with automatically configured staging and automatic heat pump lockout and easy configuration of the associated gas furnace. But we had some drama anyway.