Really, really liked the movie (just got back an hour ago). I haven´t read the book at all, but knew the basic plot beforehand so didn´t go in totally blind. Having never read the book, I felt they did a fantastic job of transitioning a graphic novel to the screen. To take a graphic novel and turn it into a movie is, really, no easy task, for various reasons (fanboys, artistic integrity, etc.), but I could tell this movie was faithful to the source material where anyone, fan or newbie (hate to use that term), would be able to get into it and enjoy it.
I was actually amazed at the amount of people at the end of the movie who, after walking out of the theater, began to talk, rather loudly, about how they didn´t get the movie and didn´t know what the fuck was going on through a lot of the movie. I felt the story was quite straightforward and not at all convoluted. While there was a lot of material presented throughout the film, it was done in such a manner and pacing that at no point did I feel lost or confused, everything played out in a logical fashion and tied up quite nicely at the end. I was left with very few lingering questions, and those questions I do have I assume will be answered in the graphic novel which my friend, who went with me, lent to me and is sitting right next to me (and after reading the first 20 pages, I can see the movie seems to have pretty much lifted the book from its pages and plastered it on the big screen, which, having never read the book before, is actually really fucking annoying).
8 out of 10, 3 out of 4, 4 of 5, whatever, it´s a good fucking movie.
Points deducted for the laaaaaaaaame acting during the Mars scene.