Two days ago, I've finished reading the Dan Brown's novel and right after I've watched the movie.

First of all: Do not ever do like this! :) (I'm talking not only for "Angels & Demons" but for all novel adaptations.)

Because the novel will cloud your judgement about the movie. Yes, I totally agree with the comments saying "the movie is way different than the book" but it is impossible to adapt a whole book for a certain amount of time. Therefore changes are inevitable.

Considering that, I might say that the movie is an above average Hollywood production with lots of action and mystery. My point is 6.5/10.

Like I wrote, I can understand changes but why did they change some names of characters? (Like Camerlengo Carlo Ventresca - Camerlengo Patrick McKenna or Cpt.Rocher-Cpt.Richter) That was the only thing I couldn't understand.