It's a shame that they left newcomer Christopher Mintz-Plasse (McLovin) off the movie poster because he really stole the show. "Chicka Chicka , yeah."
I suggest seeing this one on DVD or in a second run theater if you aren't sure if you'll enjoy a lot of juvenile humor. Knocked Up was the summer comedy for adults, this one is for teens.
Oh yeah, I forgot about this funny story. There was a dad sitting in the front row with his son (about 12 years old), and they got up an left after ten minutes. Don't go with your kids to see this one. It would be an embarrassing time for all. And your 12 year old is probably too young for this one with or without you there.