I agree with your assessment. I have an Ecobee3 and couldn't be happier. The remote sensors were the reason I bought this device - and they really work. Obviously, you can't have one furnace and expect to have every room perfectly comfortable. But, with Ecobee3, you can get much closer by not worrying about unoccupied rooms. As you move around, Ecobee3 adjusts the overall temperature in the house to keep you cozy. And Ecobee3 connects with lots of other devices through IFTTT. With any luck, they'll become part of the SmartThings-connected devices in the future!