Finally got to watch it and it was hilarious! Dupree is really annoying at the beginning, you can tell that he's going to cause some troubles for this couple, but in the end he brings the couple together and gets his life back on track. Great movie, would have been even better if it were longer :D
I loved the tension between Carl and his father in law, and Seth Rogen's character was very funny, especially from his comic take on marriage that the husband does everything his wife says and obeys her rules.