TL;DR version: A little pricy but I like the Nest Thermostat and Nest Protects.
In June, I installed the Nest Learning Thermostat in my house and over the Thanksgiving holiday I installed a few Nest Protects as well. The integration of the Protects with the Thermostats and the application was really good although the install of one of the Nest Protects didn’t go quite like their install made it out to be. I could go on more about all of it but if you’ve read the reviews online, there isn’t more that I can say that hasn’t already been said. They just work and work well.
Yesterday I made a big jump, I replaced the old hard-to-program programmable thermostats in my house with fancy new Nest Learning Thermostats. They’re a snap to install and, currently, many energy companies are giving significant rebates when you buy one. However, the real reason I got them was cause they’re freaking cool devices with lots of neat ways to interact with them. Being able to control or check in on the temperature on your house from the phone is really very cool and the fact the Nest uses weather reports to help control the temperature in the house is even neater still. Once it’s been a few weeks I’ll write a little more in depth review about the Nest and if it is actually saving me any money on electricity bills. Until then, I’m saying it’s worth buying just for the tech alone.