What a train wreck.....
I read the book, and liked it well enough to want to see the movie....boy what a mistake that was.
I honestly don't know how anyone who hasn't read the book could follow what's going on in this film. Obviously, movies can't capture all the details that can be found in the book, but I still expected things to be laid out in a coherent manner.
Sometime after I saw the movie, I was at a friend's house and they wanted to give the movie a try even though they hadn't read the book. I watched with amusement their utter confusion as to what the hell was going on. The ending in particular where Duddits transforms into a giant monster to kill Mr Gray was met with many exclamations of "WTF?" and much laughter.