The critically acclaimed comedy is a wild party of pranks, jokes but the best thing is that it has an honest reflexion of maturity and immaturity, about getting older and having responsibility - because Mac (Seth Rogen) and Kelly have new lifes. Instead, Teddy (Zac Efron) is about to get out of college and wants to party before starting to think about the future.
The positions in life of those two characters, Mac and Teddy, are clear since the beginning of the film. Mac has just moved to a new house, to establish himself and his family, while Teddy moves to the house next door because the frat he is in, burned the previous one. Teddy's speech when he moves to the new house is all about all of them being a legend in his fraternity, any other higher aspiration.
The battle between the family and the frat starts when the frat throws wild parties that Mac and Kelly would like to attend but can't because they have Stella, their little child. So, instead of declaring the war directly, they try to be friendly with the frat, and they even attend a party to be "cool". But as the parties go on, they need to remember the things they did in college to turn down the frat - like bros before hoes and other cliches that the fraternities really believe in. Everything in this film is perfectly timed and it goes on very fast, so you're never bored, is like a bunch of SNL sketches well put together to do a film. The best thing is the fact that it includes very good performances from the king of r-rated comedy, Seth Rogen, Rose Byrne (espectacular) and Zac Efron, who continues to show his potential as an actor and really knows how to manage comedy. The other incredible thing about this film is the fact that you're identified with the parents, the frat or both because there's no real villain in this movie, even if it seems like there is, the characters are like mirrors; Teddy looks at Mac as the person he is going to become and Rogen's character sees in Teddy what he was in his college days.
Besides the cast (Chris Mintz-Plasse, Dave Franco, Jerrod Carmichel...), the jokes and the comedy itself; I would recommend this film because in a certain and different way shows real life, reality and the actors themselves are in the same period of their life. It is an hilarious story about [in]maturity.