There's some interesting stuff for the fans of the manga, but if you've never read it, you'll probably find it very difficult to understand what the hell is happening or who the fuck are all these people. It's Somewhat fun, but really just a big mess. Still, it may be by far the least worst manga adaptation I've watched (because they're universally terrible). Can't say I'm thrilled to get to Part 2, but we'll see.
Awesome epic comic book adaption with a story so vast and crazy you just have to love it. Unfortunately the sequels cannot follow on the promise of this first movie in the trilogy. It really should have ended with this one eventhough the second and third movie are good.