I saw this movie twice in two days, then spent several weeks trying to compose a review... And I just can't. I literally have no words for the unmitigated awesomeness that is this movie.
1 hour and 52 minutes long, rated R for bloody violence and pervasive language. It is VERY violent and disturbing, but there's a reason for that. Don't go if it's going to disturb you, but if you do go (and you should,) DON'T leave. You'll laugh, you'll cry, you'll be shellshocked for days. Best movie ever.
Watch a trailer if you must, but other than that (if that much,) go in with as little preparation as possible. You really don't want to know what's coming, so I'm not going to tell you. Just go see it. Like I said, unmitigated awesomeness.
For those of you who have seen it, I recommend this site as a great place for intelligent discussion plus incoherent squeeage and rampant quoting. (No, I haven't posted anything there yet, because of this inability I have to say anything but "AAAAOMGOSHSQUEE," but I expect I will eventually.)
Buy District 9