I dunno, RT wasn't a huge fan.
I know you're going to say "Are you some zombie that only listens to the critics? Think outside the box!"
Except that movie critics tend to be intelligent people, and they tend to agree with me. So sometimes they save me 2 hours and $5.
On a sidenote, rent a movie called "Elephant". Its also about high school kids. Beware, it is mostly very slow, but if you don't know already, the end will shock you to your very core. (and its not a horror movie, thats not what i mean).