The Ecobee system is top notch in my opinion! Our large home has two main Ecobee consoles and 6 remote temperature/motion detectors that provide remote room status back to the main Ecobee consoles and also back to SmartThings via @yvesracine’s enhanced Ecobee integration application. If you are purchasing an Ecobee, his SmartThings application is well worth the $20 Paypal fee to expose all the API’s in the SmartThings UI and provide high end HA.
The Ecobee website has been rock solid in their service and system reports. It has a wonderful easy to navigate UI, both web based and mobile. I especially like the reports that compare my home efficiency to our region, and to other similar sized homes.
This Amazon-Ecobee-SmartThings integration might just be the thing that gets me to seriously look at purchasing first Amazon Echo.