The book is great, King is a master of setting up the atmosphere, and it shows.
Kubrick didn't understand the nuances of the book, and reinvented the story.
Both are good, but the book is still superior, there's so much more story.

There were multiple trips through the rabbit hole, each time undoing everything he'd done on the preceding trip. Each time to get everything exactly right. Looks like they may be doing a single trip, which if that's the case, detracts from the source material.