I was so sad when I watched this movie because I expected so much more from it after falling in love with the book. I still suggest others see it because it's still interesting.
I haven't had a chance to read all of the manga however I skipped to the end of it and personally I liked the movie ending better. I wish that movie had ended slightly different though, like maybe her crying herself to sleep at his grave.
My only issue with this drama was I couldn't find english subs for ep24. Even though I could guess the basics by just watching it in Mandarin at the time it wasn't worth it to me to just guess what was happening so I stopped watching it.