Our ecobee (Phoenix, so HOT) does the precooling and is buggily aware of the expensive time window for electrical rates. Arizona Power just shrunk the expensive time window, not sure how that made sense, but the ecobee seems to not know, nor is there any way i could find to inform ecobee of the new shorter expensive time window.

I've had two Nests before, and two Ecobees, and they both were fine, in general, but for the next house not sure which I'd prefer.