I have a nest and it is a real piece of shit. I usually don't curse on HN but I can barely contain my hate for this product. My absolutely ugly, crappy old thermostat with a needle on it works WAY better than the nest (thankfully we have it upstairs where we sleep). When it's cold, we turn that needle up, and we get warm. With the nest, which is downstairs, when we're cold, we turn the nest up, we get weird "+2 hour"…
Your comments are worrying, but match a disappointing number of other users. When I was ready to switch to a programmable thermostat to save money, I really, really wanted to like the Nest. It was cool, whizzbang, etc., etc. But then I started reading the 1-star reviews on Amazon, and the support forums. And it worried me. People came home to apartments that were 90* because their heaters were stuck on full blast dur…
When I was in grad school, I wired a temperature controller to an experiment, set it, satisfied myself that it was working OK, and went away. Guess what. The relay failed, and the heater was stuck on, until it melted the experiment.
As a grad student in physics (not even EE or embedded systems), I could chalk it up to a beginner mistake.
But if you design a commercial product that controls the release of large amounts of energy, you can't make beginner mistakes. There many not be many remaining reasons why age and experience are valuable traits in a engineer, but this is one of them. Germane to one of the other comments, this may also be why a 110 year old company still has a reason to exist.