I really despised this movie. The book is OK at best, but they totally mutilated it and completely changed the ending. Dudditz doesn't change into an alien creature at the end of the book. That part was so stupid I found myself yelling at the screen.
Please, for the love of Satan and all that is Unholy, no more Stephen King movies.
Unless, of course, they decide to make a mini-series out of the Dark Tower series. Those are the best fantasy-horror books I've ever read. They are the only books that he's wrote as of late that are any good. I think that's why his other work has fallen behind though. He's concentrating so hard on finishing the series (3 books in 2 years? That's unheard of for an author of his stature) that he's letting the rest of his work suffer.
Actually, Insomnia was a VERY insightful look into the world of the dark tower. I love that book.
Also, for those who are fascinated with the way that all of his works are intertwined, check out
"The Stephen King Universe".