As far as film adaptations go, I thought it was pretty excellent. It pretty much played out exactly as I pictured it when I read it in January. Of course, the movie had already been out for some time when I read it so I knew who was playing the various characters but I pictured Robert Langdon to be an older, bearded version of Tom Hanks, not the young, long-haired version in the movie. A little more like Indiana Jones than Nic Cage in National Treasure, I suppose.
The one bit in the movie that I couldn’t remember was the part about him falling down a well as a kid and having claustrophobia ever since. Not sure if they just threw that in or what, but apparently I’m not the only one.