The kinetic energy created by Howard and Hanks' collaborative efforts in bringing this book to life in a movie is unmistakably brilliant. The camera never seems to stop moving and Hanks is as rivetting as ever to watch as Robert Langdon. Howard got it right when he said Tom Hanks is an actor you "love to watch think". There were obvious and necessary omissions from the book, i.e. Langdon's helicopter dive, the ever-so-interesting "tour of Scern HQ" and the Chamerlango's backstory, but nothing that would keep a Dan Brown fan from loving what Ron Howard has done with the film.
The net-net of Angles and Demons as a movie is this - Tom hanks + Ron Howard + Dan Brown is a win win every time.