If you just want to control your AC from your phone while lying in bed, the standard is the hero of this story.
Here is a look at the "Nest story" through the eyes of different users to help you decide which path fits your home: 1. The "Set It and Forget It" Homeowner should i buy a nest
If you live in a house that's 100+ years old, your story might include the "dreaded " (common wire). If you just want to control your AC
to bypass this, but it’s an extra step in your installation narrative. should i buy a nest