For whatever this movie may lack, Piranha, when all is said and done, is a damn entertaining film. Fantastic gore and a good rampage that doesn't go amiss. Sure, there may not be that much else going for it, but I had a fun time, and I think that's all this movie was going for.
What did you think of this rendition of Piranha?
(http://fight-evil.com/movies/p/piranha3d-2010/1.jpg)