For the first 2 hours, Angels & Demons kept the audience on the edge of its seat with twists and turns at every corner. Even I was surprised and caught off guard at some points, because I had read the book before and remembered most of the main, key points. It was not until the last 30 minutes that the movie lost my interest. Not to steal the glory of those who saw the movie with me or anyone else who has not read the book before seeing the movie, but the ending was extremely altered. Even though this is a forum for people who have already seen the movie, I do not wish to post a spoiler in this statement. So, I will say this: if you want to get the full extent of Angels & Demons, and if you want to get the better version, read the book!