I have just got to say that I am a bit biased, simply because I love this movie. Jason Statham and Melissa McCarthy are awesome together in their roles, and even though Jude Law does a decent job as well, this movie is all about Melissa and Jason to me.
I find the language of the character of Jason Statham to be very ugly, but still, it is needed to make his character be in the way it is supposed to be. And to be honest, he is completely hilarious!
Melissa is something very similar, and she is perfect for her role as an analyst that has to work undercover, taking the place of all other agents whose identities have been revealed to the "enemy".
You will get lots of reasons to laugh throughout the movie, and it is incredibly easy to enjoy every second.
A little warning
You should be warned though... if you like this kind of humor, it is awesome. But, if you like to eat lemon and feel angry when people behave in stupid ways in movies (like in Mr. Bean and in Dumb and Dumber), this is most likely not a movie for you!But, if you like crazy humor, you should go ahead and watch this movie - it is pure gold!