We like the Nest
We have installed quite a few Nest Learning Thermostats and we can say it’s definitely cool. It looks great, learns your routine, and saves money. We recommend these thermostats for folks who want simple, effective control. If you are a person who likes a lot of detail and freedom to program, then an Infinity Control is probably more your style.
Below is a quote and video from the makers of the Nest. (nest.com)
Turn it up, turn it down. The Nest Learning Thermostat remembers what temperatures you like, creates a custom schedule for your home, and turns itself down when you’re away. Control it from anywhere with your phone, tablet or laptop.