I'm a fresh newcomer fan. I decided to take my friend to the midnight show because she's really into the Saga. As for me, I was curious...until I decided to read Twilight before the day of the event. As I finished the last chapter, I became more anxious to see the movie! I was NOT at all disappointed!
BUT I do recommend reading the book first! It really helps you get into Bella's thoughts a little better than the movie. Then you can know when the heart throbbing moments are when she's speechless!
It was such a great experience, waiting in line, meeting anxious fans, and all of US enjoying it as one big fan group in the theater!