Google's immersive advertising campaign for DaVincii code worked on me. Sovling the onlne puzzles got me intrigued enough to want to see the movie, and thus read the book first. Here are my thoughts:
Perfunctory prose with scarce character development (supposedly Angels and Demons did that) and awkward dialogue that existed only to advance the plot reminded me of a Hardy Boys novel. Maybe I just haven't read fiction in too long, but I tend to expect better even from my comic books.
It is however my kind of story, though Umberto Eco's Name of the Rose did the whole biblical grand conspiracy story several orders of magnitude better, but this was defiinitely much quicker of a read, and filled with an interesting plot and intriguing historical details (like where the word horny comes from or how to better appreciate renaissance iconography or how a sexual orgy can be a ecstatic ecumenical excultation of the Goddess [though not as novel as Neal Stephenson's sexual orgy as primitive archo-Internet packet switching]).
Also interesting to compare to the retelling of the same conspiracy story in the crappy Nick Cage movie, American Treasure.
The cheesy travelogue descriptions of parisian and london tourist traps, were good for me to relive old vacations, and gave greater appreciation of paris and da vincii and the mona lisa. The book rewards the avid casual tourist who knows that westminster abbey is right by parliament and houses the tomb of newton.
In the end, a satisfying plot, with interesting colorful side characters (Silas, Teabing), I enjoyed the read. Angels and Demons is next on my queue.