I tried to read The Dark Tower once when I was desperate for material to read, but oh, my God! Stephen King is such a HORRIBLE novelist!! After the 6th page of pointless, excessive, maudlin description I just slammed it down and walked away. Stephen King may be brilliant at writing screenplays, but he's too obsessed with details to do novels. That's a positive trait in a screenplay writer, but in a novel, all the endless description bogs the story down and doesn't let it move.
Now if he Seussed it up, it might be worth reading