Any advice before I venture in that darkened realm?

I did take the time to watch the viral videos and read up on it, so I'm kinda in the mood. Now don't get me wrong, I'm not out to bash the film. It's just my perception has been tainted by the polarizing reactions other's seem to have about this movie. From what I hear, the concept was intriguing but the final execution was flawed on several levels. So I am expecting a decent movie overall.