I have 3 Ecobee3 thermostats at home and in general very pleased with them. The only issues I had - from time to time they loose connection to remote sensors (reconnect back without me doing anything) and once a thermostat got stuck on heating - rebooting fixed the issue. Otherwise works great, with great set of features that work as advertised and new updates coming regularly (Ecobee3 was first thermostat natively supported by Amazon Echo)