I think the movie was great, I never read the comic so I can't say anything about that but I read that people who had read it said it stuck pretty much exactly to the comic except for the end. I also watched an interview with JDM (Jeffrey Dean Morgan) that was amazing. He said that they didn't have a script to go by the way most movies do, that they only read from the comic itself as a script which is totally cool.
Here's the interview if you guys want to take a look! Oh yeah and it's hilarious - he caught on fire during the filming in one scene lmao it's so funny how he describes it. ^_^WATCHMEN Interview; Jeffery Dean Morgan - PonderPop