It wouldn't have been sufficient to save the buildings pipes in -30°C in a restaurant full of embedded draft lines, however.

Nest did give her control over the entire building's system. IIRC it was actually an employee that shut the system off after a power cycle/outage thinking they were protecting the equipment, but failed to restart it. If she hadn't had the insight the system would have been off all night.

I think it has its perks.