[pellucidar]

We got Ecobees as part of an HVAC overhaul; they're nice and it's impressive how many situations they handle out of the box, whereas we had to run a new wire to get the (pre-Google) Nest to work correctly when it was already supposed to work with our existing setup. I do have issues with the software, though: we have two zones and it just doesn't handle that situation conveniently. (I don't know how the Nest would have done because we had only one zone with it.)