Harley is the best thing on this movie. The actress was born to play this role. :)
I'm a bit biased on this, because I loved the manga and obviously the anime. I grow up watching it.
The movie is really well done.
It completely captures the feeling/spirit of each character. There's only a few good manga/anime adaptation for the movies. This is indeed one of them.
I sincerely hope they make another one.