I've seen it. I found it enjoyable but not as endearing as the first one. The story lines seemed so forced in places trying to explain just why all those people were still in college or back on campus for whatever reason.
The girl from Guatemala cracking all the immigrant jokes seemed like a Sofia Vergara knock-off character to me and I felt bad for the actress because being a cardboard copycat character doesn't give much room for acting potential.
Hailee Steinfeld was adorable. I realize they weren't going to get Anna Kendrick and Rebel Wilson back unless they promised them major story lines, but I felt their offshoot story lines really detracted from the group cast.
And I hate to say it but I really felt like the final Acapella performance just didn't have that "OMG they just changed the face of Acapella Performance for the rest of time!!!" feel that they managed to give in the first movie. The "big surprise" was kind of touching but I didn't feel it was knock it out of the park outstanding.
But sequels more often than not completely suck and this one didn't so overall, I think it was a good movie.