Well, in this case, you can judge a book by its movie. I read Heartburn about a week ago and just finished watching the movie. Nora Ephron also wrote the screenplay so the movie followed the book very closely. Of course, as usual, the book went into more depth and off on tangents and gave actual recipes, short as they were, where the movie glossed over things, stayed on point, and only a few snippets of recipes were discussed.
All in all, since, as I mentioned, I read the book over too long a period to keep the characters straight in my head from one sitting to the next, and I watched the movie all in one chunk, I'd say I liked the movie as well, if not better than the book. Strange but true. The only other time I can say that was with the short story Brokeback Mountain and the movie. Both good but I think the movie really captured Annie Proulx's writing. Very well.
What book/movie have your read/seen that really stuck with you? Is the movie ever as good as the book for you?