A bit of a spoiler-ish.
I seriously loved it. The scenes they added were very good. I did not expect to laugh so much in this movie. They did a good job showing them grow up as well as making the audience realize that it's really getting serious.
I only have a couple complaints. They did not do the Dursley scene. And while harry is in the room of requirement he is supposed to have seen the diadem. That plays into the last book and is the reason they end up in Hogwarts.