The movie has beautiful cinematography and the music helps create tension in the most pivotal, tense scenes. The script, although sometimes hard to follow, creates a great mystery thriller from beginning to end. Seeing it a second time, I think I understood the characters' motivations more and how everything fit together. I really think its one of the more underrated movies to come out in the last decade and should not be overlooked by film lovers just because of the high school setting.
I highly recommend this movie if you like noir, off beat high school movies, or Joseph Gordon Levitt.