Everyone was comparing this to Hangover 2...About the only comparison I could find is that they tried to find very similar characters to play off each other...That, and it was freakin' hysterical!
For my 2 cents, Melissa McCarthy is the #1 reason to see this movie. She was so funny it hurts...I won't spoil the movie but for some of the things she does, you can just tell it was ALL her and no direction. I would be shocked to find out she was directed to do these things "The way" she did them.