Keeping true to most National Lampoon movies the storyline is a possible, not likely, but fun one to follow...
It's very funny with a lot of laugh out loud moments. It has some great actors with a few returning actors from the first one and the girls are smoking hott as always.
Actors however for the most part were kind of bad - there was no convincing scenes as far as maybe thinking for a second this could really be happening. Some of the storyline was more stupid then funny and some made no sense at all.
Overall the movie was okay and kind of funny. It's biggest flaw is it has to many storylines going on at once. There's a porn star, virgins trying to get laid, stoners trying to find a way to get high, teens competing over a grant, and the biggest one being a stolen jewel aboard the ship. Had this focused on one storyline only it probably could of avoided most of the movies downfalls. It's worth a laugh on a bored night, maybe a cool flick to watch while drinking, and something that you would not want to put a whole lot of focus into. It's not good, but its not worth crossing off if you like the first one - if you did not then ignore this one because it suffers from the typical sequel syndrom as well.