If I didn't know the book almost by heart, I'd say pretty good. As I know, I'm a bit disappointed, as usual with Yates's work and adaptation. He has so little respect for Harry, and invents so many unnecesary things. What's with Snape's tears? Since when pensieve memories come in the tears? Why so little dialogue in the epilogue? What's with the entire Helena Ravenclaw scene? How did Harry learn about Teddy? The stone falls when Harry's hit by the killing course, not the moment he talks to the Marauders.

Technically, yes, very good. Story-wise...