There's some terrible schism between people who really liked The Watchmen movie, and people who hated it. I don't understand it. Other than it being really long, and the ending kind of being fumbled, I really liked the film. The opening credits alone were almost worth watching the movie.
The film is ridiculously faithful to the graphic novel, with the only real deviation being the ending, which was clearly written to make more sense than the "Psychic Octopus" ending (although the big "NOOOOOO!" was really dumb).
It's really a cool take on an alternate universe America.