I just got back from seeing it. It kind of follows the book but adds stuff to it as well, for example Azog is still alive and is hunting the group which isnt in the book at all. Also the forced Elijah Wood cameo at the beginning annoyed me alot. Some of the CGI just looked wrong, Radagast just annoyed me and Gollum was played off for laughs.
Its not a bad film but if you're a fan of the series you'l either be disappointed like me or love in blindly like my fanboy friends.