Before you reach for your ticket money, remember that this movie makes no attempts to criticize the things the characters do. That will be your job. As Bob said, young teenagers will probably watch this and come out thinking, "Wow! Those characters are awesome. I wish I was like that." It's pretty heavy stuff if you're disillusioned with this mindset, and you will probably leave feeling depressed and disappointed with society. My main point is, you probably shouldn't go to see this if you're looking to enjoy the experience.
Like a number of art films (particularly Melancholia for me, ugh!) the objective is to make you ponder rather than to make you feel good. Honestly, like most modern art, I'm not sure if there's really a way to set this apart from the movies that genuinely do try to cash in on teenage naivety, since the main difference is whatever the director was thinking when he made it.