Preteen girl version of The Hangover. Got it. :-P
As someone who is NOT in the target audience for this movie, I actually find it a pretty bold move, one that, while still being formulaic of what came before it, also shows respect for the movie it was inspired from. I'm only 23 minutes in, and I'm already interested to see what type of disasters await these 3 (but technically 4 since one is missing :-P) best friends who are still a good 7-8 years away from being old enough to actually recreate The Hangover in it's original form... :-P
So yeah... 8-10 on the intro to the story at least.