i enjoyed it. truthfully i didn't see the first one until like 2 months after it came out and i was so unimpressed because it had been hyped up fucking sky high. I saw the new one right away and I really liked it, it's definitely the same story almost as the first one but it's still entertaining and funny. Galifinakis and Ken Jeong make the movie, they're hilarious.
as eheath said, it's worth seeing once. I would see it again, but i'd def recommend at least seeing it once.