FINALLY! I was waiting for this trailer for so long, and it was presented the other evening at the MTV Movie Awards 2012. What I think about it? It was exactly I wanted to see. It's witty, smart, careless and meaningful. Emma Watson, Logan Lerman and Ezra Miller were the perfect choice to play the main characters. But I'm not very surprised, considering that director Steven Chbosky is the writer of the book of the same name.
The film will be out in cinemas this September. If you want to know more about "The Perks of Being A Wallflower", read this article.
P.S. If you haven't read the book yet, do it. It's great.