Aside from the cover art having nothing to do with the movie (none of the people pictured are in it - including the dog or the house), the title being irrelevant to the story, the plot description repeating the "12 friends" line when there was 9, this could be decent.
You get 90 minutes of guys and girls talking about their sexcapades, drinking and trying to sleep with each other. There is a subplot involving one of the guys working in a porn shop, which is what gives this the R rating, otherwise the remainder takes place at one house over the course of a weekend.
A few laugh out loud moments, a lot of stupid idiots drinking, etc. One of those movies you might play as background at a party that no one is really watching, but would grab a view when the token fake boobs (really bad augmentation too) pop out a couple times. No special features, and film quality was poor to average. 5 star reviews? Please.