I wasn't really as impressed as I thought I would be. I mean, the 12-year filming is really cool, but 2/3 of the movie was filmed when he was 16-18 years old, so it really didn't matter as much as you might think.
I liked it, but I thought they spent way too much time in his HS years, yet the story didn't benefit from it.
Also, they should have ended it in the bar with the dad explaining the meaning of life. The final scene was kind of cheesy.
Also, what was with him getting bullied in the bathroom? he was bigger than both of those guys and he didn't really seem like the bullied type during any other scene.