Spring Breakers: I'd say it's neither a masterpiece nor a disaster. The cinematography is generally pretty decent and the filmmakers definitely have a strong sense of what a 'crazy party' really looks like, but the film doesn't seem to understand who it's trying to market the film to or what it's trying to say (though it's definitely trying to say something or other).
Presumably it's telling us in the classical style of a morality play that drugs, pre-marital sex, crime and being a poor student are bad things, but as a movie that wavers unevenly between realism and a cartoonish caricature of college life it shows shockingly few actual consequences to anything the bevy of lovely but...ahem, 'academically challenged' ladies do (of whom it is abundantly clear that three out of four of the female leads have no-nudity clauses in their contracts). In a sea of decontextualized nudity and partying it seems to want to throw up the horns and give us a "Grrrrl power!" rallying cry that simply doesn't fit the tone of the movie. A schizophrenic film, and unfortunately not always intentionally so.
It's not a bad movie by any means, but it seems completely oblivious to the fact that it's not a good movie either.
Minor comedy tip: having James Franco be a white gangster with dreads who thinks he's a badass and dresses like Weird Al is funny. Actually naming him Al ruins the joke.