I went into this movie expecting a B grade, trashy vampire flick. I was very pleasantly surprised.
The plot was interesting, the acting was good, the dialogue didn't feel wooden (although, that's based entirely on the English subtitles).
And there were a few scenes that I really enjoyed and thought were especially interesting and well done.
Louise biting Lena in the bathroom, for example.
More than anything, it was great to see some strong, relatively well developed female characters in a horror film.