Guys Does anyone have a NEST setup at home? Looking for real world feedback on how good they are or otherwise. Been speaking to an installer about my current oil fired boiler setup and NEST. He's told me I can install fine, but as I can't control hot water via the current setup, then there is a very small risk that if my house heats up quickly, then the hot water might not be as hot as it currently is. He's also said there will be an annual saving on fuel bills, simply due to the fact that I'll be introducing a thermostat in the house, rather than the boiler just bubbling away.