I've never read it, but I also don't plan to. After hearing what it's about, it seems like it would be really predictable. While touching, I don't think I'd really be into a book that doesn't have much surprise in it.
I haven't read it either :/ but I saw the movie trailer, and it looks really cute :D I don't think I'll read/watch it though, because the main character dies and I don't like tragedies that much :P