Just kind of lame. Actors try hard but the script is just not that interesting. I have not read the books so don’t have a good comparison for the story. Here the stage is so huge (the entire universe) but the story does not have that kind of scope.
Leonard Maltin/Plot synopsis:
The last Gunslinger, Roland Deschain, has been locked in an eternal battle with Walter O'Dim, also known as the Man in Black, determined to prevent him from toppling the Dark Tower, which holds the universe together. With the fate of the worlds at stake, good and evil will collide in the ultimate battle as only Roland can defend the Tower from the Man in Black.