SPOILERS:
I thought the Voldemort-fetus thing was done really well; just as creepy as I imagined it would be
. And yep, Neville was a badass, but the scene where he kills Nagini was better in the book IMO. In the movie it happened pretty much at the same time as Harry's duel with Voldemort, so that kinda overshadowed his moment of awesome (whereas in the book it happened earlier IIRC).