What does Eco Mode on the Mustang’s AC do, and how does it affect fuel efficiency?

[v8ismyheart]

Alright, I’ve been using Eco Mode on my AC to save some gas (because who doesn’t love a few extra miles per gallon, right?), but does it actually make a big difference? It doesn’t seem to cool as fast, but I can’t tell if it's saving me much. Anyone else have any experience with this? Also, any tricks to make the AC more efficient without sacrificing comfort?