Character development was extremely poor, I couldn't see how Jaime's actions progressed to the extreme in such a short time. Also the fact that all her friends turned on her in a snap is not believable. I love all of these actors and wanted so badly to like this movie. But it was crap.
I also noticed that they tried really hard to capture the fashion of 2003 but failed miserably. They pretty much just decided to go with 1997 fashion and decided meh close enough.