I believe the complaint everyone has is that it doesn't match the storyline in the book exactly,
which is completely true.
I think of the series as a side story rather then a part of the novels.
Lets be fair, do you really think that could cover the werewolf novel properly in a movie.
I mean three different types of werewolves and all the required CGI, animatronix, and make-up as well as the costumes.
You would still have to deal with all the explosions.
Seriously people there is no one who could exactly do it right.
I remember one novel series, they finally did a artwork book for it, and the artist was repeatedly told that he got the coloring wrong for a certain character.
He then looked through the entire series and realized that there was not a single description on the character's color.