Everything was practically verbatim from the first 24 (or so) chapters of the book. It worked perfectly. It made me see that splitting DH in two really does justice to everything JK Rowling did with the seventh novel. So far, so good. I'm sure that David Yates, Dan Radcliffe, Emma Watson and Rupert Grint will deliver again with the final film.
The beginning felt a little rushed but I can forgive that since they needed to get to the plot as soon as possible. Besides, they'll probably add some stuff in for the DVD.
I liked Neville's little cameo. There were others who I missed, like McGonagall, but I guess you need to save some characters for "Part II", right?
Hedwig's death was heart-wrenching, but not as much as Dobby's. There was much crying in the theater at that point. They sure did shoehorn him in here, but they made him more lovable than in COS, which made you feel even more miserable about him dying.
The nude makeout session between the fake Harry and Hermione in the locket was a bit extreme. Sure, it wasn't graphic, but it seemed like they were naked for shock value. Not that I'm really complaining, though.
My only complaint is that Pettigrew didn't die when he should have, but I'm sure they're saving his death for the next one. Maybe Voldemort will make an example out of him at the manor.