It is pretty much the same as part 1 just in a different location. If you enjoyed part 1 then you will enjoy this one as well.
The Hangover Part II (+Ultraviolet Digital Copy) Reviews
Cons: the level
I was deeply disappointed with the second part. I didn't expect much with the first but it was really a good piece of comedy. I expected the same with the second and it was crap, sorry. Really forced and mediocre.