As it is by Stephen King, I have been seen it’s movie as well as read the book, too. "Doctor Sleep" is an average type because its a sequel so fans will compare it with first part that is "The Shining". The Shining was the best movie of its time in horror category. Doctor sleep is nice too as its extend the first part ahead. But, its kind of boring because of the same story thing of horror movie like, an evil cult is chasing behind children who has special powers. this type of storyline, even there on "X-Men" or "New Mutants".
It has some good points too that somewhere the scenes where the how the powers of every person introduces such as the main character and the cult members so that description, of course its Stephen king so he written do nicely and briefly.