@drjb, I had Nests for a bunch of years but finally replaced with Ecobees about 4 years ago for 3 reasons:
- Remote sensors - Ecobee thermostats can be set to respond to different temperature / motion sensors in different areas of the house during different “comfort periods”, and even based on motion/occupancy. We had the same problem of wanting our bedroom temperature to control the heating temperature at night, not the temperature at the thermostat.
- Manual control - Ecobee allows much more manual control and programming than Nest - Nest magic is great when it works, but level you with little recourse when it doesn’t. Ecobee allows far more manual tweak, especially with the aforementioned sensors.
- Data access - Ecobee give you access to 5 min resolution data about heating / cooling operation. That means one can do cool analysis like Sense detection vs. Ecobee commands (below). Nest/Google doesn’t really give you access to that data AFAIK.