This is one of the biggest movie disappointments ever for me. I have read all the books and have been dying to see it end up on a big screen or a tv screen for what feels like forever. I was thrown off when I first saw the trailers because they didn't make sense in terms of which book they were doing. I kept putting off looking into anything because I didn't want spoilers or anything. It turns out that they did not adapt any of the seven books. Actually they just took bits and pieces from some of them and positioned the story AFTER the whole book series kind of. It was very choppy and rushed and completely wasted the best parts of the movie - which were Idris Elba as the Gunslinger and what could have been McConaughey as the Man In Black. They made the movie more about the kid and through his eyes with no adequate background given to everything else. Basically, they tried to make the movie "down the road" so that you could enjoy it if you read the books but also enjoy it if you hadn't and failed on both fronts. No fan of the book will be a fan of this movie because of how wrong it fells on so many levels and no newbie will be a fan becuase the books end up being like a prerequisite for understanding it.
I would not recommend anyone bother with this movie. It was flawed in so many ways. The show really should have been brought to tv like Game Of Thrones or Westworld. That would be the only way that I could see this whole story being given justice.