Bellatrix is the only character in the film who has exceeded my expectations. The way Bella is portrayed - slightly unhinged/a maniac. She appears more twisted than Rowling can ever describe her in the book.
I enjoyed the film, but comparing it to the book its rubbish. Adding in new events, like the attack on the Burrow is pointless - what happened to Greyback biting Charlie, or his relationship with Fleur? They missed this out which makes me wonder how they're going to introduce the next story (starting with a happy scene at the Burrow)
I think Dumbledore asking about Hermione is supposed to signify the relationship between the two. In the films it hasn't been portrayed as well - mainly because you cannot see into the characters thoughts/minRAB the way you can in a book. I dislike the way Fred and George talk - they don't need to talk in unison, finishing the sentences/switching speech between the two characters would be more effective.