Go see it, yes.
GO NOW!!!
Deviates a bit from the comic, but that's just because of comic content. The... ah... execution-style shooting for a specific character would've been a bit too much given the lightheartedness and overall tone of the movie, for an example. Still pretty violent and the movie runs at a good pace. Each actor did a great job bringing the specific characters to life and Nick Cage was awesome as Big Daddy.
100% worth the cost to get in. 9.5/10 in my opinion. You'll laugh, cry and go HOLY Crap at some of the stuff.
WHY ARE YOU STILL NOT AT THE THEATER YET?!?!?!?