We purchased the Honeywell Home so that we could monitor the temperature in our cabin while we were away. It was very easy to install. My son and I both have the app on our phones and it definitely came in handy when we had a recent cold spell and the furnace malfunctioned. We were able to take care of the problem before there was any damage.
I don't have any major complaints so far. It was installed easily and set up went pretty smoothly. I like having the controls on my phone. The only complaint is that with the part that automatically changes temperature when away only worked on my husband's and not mine. In other words, when husband left house, temp would drop to what was set, but I was still home.