I have an ecobee, it seems to work pretty well, and has definitely saved us money on heating and cooling costs since we bought it. As for automation and APIs t

I have an ecobee, it seems to work pretty well, and has definitely saved us money on heating and cooling costs since we bought it. As for automation and APIs to control it, generally we only use the Android app, but we have linked the ecobee to the Google Home app. I haven't yet tried to add it to the Mozilla webthings server running on our Retropie. We only have a 2 bedroom apartment, so our scope for lots of automation is somewhat less than if we owned our own home.