Yes.
My Nest paid for it self in the first 6 months in savings in energy costs. I never have to touch the heat, its fully automatic. The schedule handles all basic task for up/down and the GPS based automatic part handles setting away mode anytime I leave the house.
We love ours. Paid for itself in first 6 months. All is automatic
You saved enough using Nest to cover the $249 purchase price in just six months? How? The only thing I can think of is that you either stayed away from the house just to show friends how the thing shuts off the HVAC when you weren't home, or else when you were home you didn't do anything - you simply sat there staring at it. I could see $10-15/ month in savings, but $41.50/month? There had to be something else going on there. Like maybe, your old thermostat was possessed.
Perhaps it makes sense up north, where you have HVAC concepts biased towards heat.
Down south the Nest makes less sense. We rarely use the heat in our home. In the winter we throw a space heater in the bathroom since thats used mostly when we first get up and then again when we get home after work. In the summer, the AC stays on all day and all night. My AC system is purposely designed slightly undersize to ensure this. It keeps the air drier and mold doesn't happen. Otherwise one runs the risk of having aspergillus blooming indoors. There is no way to make use of a Nest or any other programmable thermostat for the express purpose of having the system run less. That leaves the only use for Nest is as a data-mining device for Google.