For fans of Hanks, this might be a decent film because his performance was top grade as he usually is. But thats about the only thing that was really worth while with this "sequel" to DaVinci Code.
The puzzles were trivial at best, the story was somewhat predicable, the events don't always add up, and the over experience just did not leave the viewer fulfilled.
If you love Hanks and/or Dan Brown, it would be a somewhat decent excuse to sit still for 2 and a half hours. Other wise, save yourself some cash for the next block buster.