I personally thought the film was very intruiging.
Back in 2000, I voted for Dubya. And honestly today I will vote for Kerry in a heartbeat.
I laughed, I cried, and I cheered at the end.
I definitely think for those critizing something you haven't seen yet, you should really try to go in there and see it with an open mind.
While people may say "this man is biased", yadda yadda yadda, think of what you've seen in the news... CNN, FOX, whatever. That's biased too. They show you what they want to show you, and in my opinion, Moore is showing you what the media didn't cover.
ETA: check out his website for reactions tp the film from ppl across the States.
www.michaelmoore.com