I listened to the Simon & Schuster Audiio audiobook.

The historical tidbits were really interesting, and I believe King did his utmost to paint an accurate picture of the time period.

I loved the intersection of the story with the universe established by some of his other books, including the scene with the characters from It. I also thought the time travel explanation was pretty good with just enough hand-waving to be acceptable (the summary on Goodreads makes it sound pretty ridiculous).