This was so easy to install! I was up and running in about 5 minutes. My only gripe is the scheduler on the app. The days of the week are down the left and the hours of the day are across the bottom. If you want to schedule a time/temp, you just go to the day, then click on the time you want, then adjust to the temp you want it to be. Seems easy enough, however, you have to add every single time you want to change the temp, and the hours are in 2 hour increments, so if you want to have the temp go down at 10:30, it's almost impossible to get the right time. I usually settle for something close. I've only had it for a little over a week, so I really can't tell yet if I've saved anything on utilities, but by looking at my usage (usually less than 2 hours each day and I live in Wisconsin), I think I may be pleasantly surprised.

Installed yesterday with a new 2 stage HVAC system. Love the technology of this thermostat and the fact that I can control it with Amazon's Echo. The Nest app is also a plus as I've found it easy to use. Since I only recently installed it (well, my HVAC installer did) it hasn't learned anything about our schedule so it'll be a while before we get the benefit of the auto programming.

A note about their tech support. I had found support for our Nest cams to be excellent. Not so for the thermostat. I used the chat feature to ask a very simple question about the Nest thermostat: how to you change the setting so that the fan only runs when the system is cooling or heating. My installer had set it to run all the time. The agent had no clue . While he was posting links to Nest help articles that has nothing to do with my question, I figured out how to do it. When he asked for a photo of the wiring I told him I had figured it out so no need for a photo. Did he ask me how to set the fan to only run when cooling or heating so he could help the next customer? Nope! He just asked if there was anything else he could help with. I don't blame the agent, I blame Nest for not educating the agent. Of course he could have asked me to educate himself.

Fortunately, Nest has a lot of documentation on their site to help customers answer their own questions.

These are so easy to install and get setup, even for someone with very little tech skills. If you are able to pull off the old thermostat and take a picture of the wiring configuration there, turn a screwdriver to install the new base, and match those wires from the picture right back into their proper label - then installing this should be a breeze! Every little bit you can save on heating these days really helps and Nest does a great job keeping the house comfortable while being smart about energy usage.

3 stars because the Nest support line is HORRIBLE! Pray to anyone or anything you have that you NEVER have to deal with them. Their solution when you can't add a family member to the account - don't add them. Their solution when their website is broken and can't send a confirmation email - keep using different emails until one works, because we all just have 50 Gmail accounts waiting to be used for one single login.

The product by itself is great and would be 5 stars, but the instructions do not adequately address two wire heat only systems. In addition, I spent almost two hours on the phone with their customer service team trying to resolve the installation before they sent me another unit. Turned out they did not have instruction on how to connect my system despite indicating that it would work.
I ended up on YouTube to find videos that informed me that the nest instructions were incorrect and that I needed to add a 24v transformer to power the thermostat. I bought one and the wire I needed, connected it all and now it runs great.

If you have only 2 wires, you MAY need to ad a transformer. If you know that going in, you will be pleased with the Nest!

I live in 1930 built house. We have pipe heating and the thermostat is in 1st fl and bedroom in 2nd fl. Additionally we had old thermostat, and it was half broken while we were remodeling the house. So. I looked up the installation in youtube to make sure my thermostat is compatible. and it was so I purchase and installation was BREEZE.. done so quick.. out with old and in with new. LOVE THIS. ALL Shall have them..