I agree. It explains why Severus' patronus was how it was, and how deep the connection he had with Lily was. It was very sweet, I thought. I knew he was good all along
I'm also glad Harry turned out better than the snivelly, whiny child he used to be. And Neville! WOW! I love how he became the Herbology teacher, doing what he loves best.
I LOVED how the book read, very fast paced, almost like watching a movie.