I know the comics. I love the movie, its a masterpiece! Definately on my top 5 movies!
First of all: I have not read the comics, which might explain my judgement.
I was very disappointed when I saw the movie. It started out as a great super hero move, but about half way through the plot got extremely heavy and long tedious dialogues took over instead of the action. By the end, you are just sitting staring dumbly at the screen trying to keep up and finally you are let down by a lame ending.
Disappointed is what I am! Did I expect the wrong thing from this movie?