There have been several screenings of Perks now, and its getting rave reviews. However, the critics haven't released official reviews yet, so I wouldn't take that 100%.
Sounds like good news, though. The book is my absolute favourite.
I'm worried about Emma Watson's casting though, I really am. I like her as Hermione, but shes nothing like what I imagined for Sam, and the trailer hasn't pulled me in. Ezra Miller is completely different to the Patrick I imagined too actually. But Logan as Charlie? Perfect.