I read the book a couple days ago just to see what all the hype was about, and decided to go see it today.
Obviously, there are more detailed parts in the book that were left out for the movie. But I thought that Jennifer Lawrence played the part pretty well. And by the way, she is smoking hot!
It's a 2 1/2 hour movie, but it didn't seem like it to me. Overall, I'd say its worth seeing.