I agree, I went by myself and left wondering how some one that didn't read the book would feel. Underwhelmed with the plot? Confused?
But from my perspective the movie was a fantastic sensorial companion to the books. I felt it nailed everything (or maybe I was justed primed to accept this). Everyone must watch this in one of those simulator-4D screening rooms with vibrating chairs.
I left unsure about the portrayal of Jessica and Gurney though. I found Jessica from the movie overly unsure and emotional to what I imagined. And Gurney too stiff.