I haven't seen the movie yet but I read the book earlier this year and loved it. I'm expecting something similiar from the movie.
The book was very poorly written but it kept me engaged because it was just a great read.
I'm reading angels and demons now. Similiar read but not as good of a book.
I read Angels and Demons first, and thought it was a better read. I think one book will always taint your opinion of the other because the plots are so ectremely similar.
Anyway, I won't go so far as to say it is a poorly written book. I think the measure of a book isn't the the linquistic skill poured into it, but rather the way that it captivtes its reader. Both A&D and Code do this very well. Brown has other books out there that use the same type of conspiracy/secret revealed plot that don't read nearly as well.