This is a fairly comprehensive calorie guide, especially for basic foods that would make up your diet (like fruits and veggies and lean proteins, etc.)
I found the fast-food restaurant guides to be somewhat random and incomplete. Most popular places were included, but often only a small selection of their menu was given. Plus some of the large national chains weren't in there (maybe they couldn't get permission?).
The guide can also be somewhat difficult to navigate, the order didn't seem to make much sense, although I suppose you could just tag the pages for items you frequently eat.
All-in-all I'd recommend this as a good pocket guide to carry with you when you go out, because it is small and light and does contain a lot of information, even if it's not perfect.