Then you don't understand the product. In case you aren't just a poverty troll: http://nest.com/saving-energy/
Remote access. AUTO Away.
Those 2 features alone make the 'stat pay for itself in real $$ as well as convenience.
I have 13 months with it and it's one of the most satisfying "home improvement" upgrades.
The fact that while in bed I don't have to get up to go change temp is worth everything in the world.
Everyone is a critic with this thing. What I find interesting is the ones who criticize it are the ones who cant afford it or the ones who already have low energy bills (either because of ridiculous settings or an eco-friendly home).
Personally the nest has been great for the last 5 months. My energy bill this winter was about $100 last winter it was $180.