I was expecting to leave the theater disappointed after seeing so many bad reviews, but the movie held up for me. I can understand most of the complaints, there are a few moments that are just like the first one (but, I wouldn't call the movie a carbon copy as others have), the raunchiness did get a bit excessive at some points (that thing at the strip club was a bit much for me), but none of these were deal breakers.
The first 3rd of the movie highly benefits from referencing the crap out of the first movie. Lines like "It happened again" and "We really fucked up this time" will make you laugh, one could call it lazy writing, but I still laughed so I'm not gonna fault them for that.
This time around Stu is the one getting married and brings the gang to Thailand. He doesn't want a bachelor party and wants everything to go smoothly. But one drink and a few marshmallows on the beach later, we find them waking up in a hotel in Bangkok. There are a few more plot details, but its comedy that relies on the element of surprise, so go be surprised.
Amusingly enough Doug wakes up perfectly fine back in Thailand. Which is kind of a shame, because Justin Bartha doesn't get any time to show off his comedic talents (they gave him a few jokes in Part I).
Much like the first one, it does rely on a lot of shock humor, but there are a decent amount of verbal jokes thrown in.
Performance wise, Galifianakis' Alan isn't as fresh this time around, but he's still funny, Cooper as Phil pretty much does what he did in the first which hold up quite nicely, and Helms as Stu is as funny as ever, it is a treat to watch him flip shit (and with good reason in this movie). Ken Jeong is back as Mr. Chow, who isn't as overexposed in this one as I felt he'd be (the character works, but only in small doses).
Of the Wolfpack, I found Stu to be the most likable and the guy easily got the worst of it in the first one. In this one, he gets the worst of it again and it's like 10x worse for him (Again, the strip club was a bit much). Poor guy. Alan simply just wakes up with his head shaved, and the only bad thing that happened to Phil didn't happen until halfway into the movie.
There are plenty of jokes and the movie will keep you laughing throughout (whether its more than the original is up for debate), but the jokes do feel a lot meaner and there's at least one joke for everyone that's gonna make you say "I really wish they didn't go there" (I counted 3 for myself). It is mildly offensive at some points and there is a photo at the end that does go a bit too far, but not a lot of people are gonna pick up on it (pay attention in history class kids).
Overall, The Hangover Part II is a good time at the theaters and is definitely worth checking out. THIS ONE IS NOT FOR THE KIDS!!! (Or members of PETA)