For the most part, I found that they did a good job including lines from the movie and following the story line, with some changes to help coincide with previous movies. However, I think that those who have not read the books were probably left a bit bewildered. The movie had a lot of comic relief, which always helps keep the audience entertained. I had a few issues with the movie though. I really would like to know why exactly they had the death eaters attack and burn down the Weasleys house?? That was definitely not in the book and I cant come up with an explanation for what purpose that served. If anyone else knows, please enlighten me