While the story varied greatly from the book, great acting performances were put in by Tom Hanks, Ewan McGregor, Stellan Skarsgard (Cmdr RIchter) and Pierfrancesco Favino (Inspector Olivetti). The movie was fast-paced and the 2 hr 20 min running time didn't seem that long.
The movie leaves out many of the explanations and motives from the book, along with the dialogue that makes following the path of the Illuminati some of the best parts of the book. Those who have read the book will be slightly disappointed, but the quick pace and great acting will still make it enjoyable to see. Those that haven't read the book will probably love it.