Review will be posted after this month's bookclub meeting.
In short: while I warmed up to the story by the end of the book, the movie's better. Very rare to say, and I'm kind of glad-- it just gives me another reason to like one of my favorite childhood films.
The 30th anniversary edition includes little snippets of unreleased sequel, Buttercup's Baby, and they are both suspenseful and hilarious. Hopefully Goldman will publish it someday.