The acting is very persuasive. I found my disgust swelling as the movie progressed but not because the movie was bad, but because 'Lizzy' began doing increasingly more grotesque and absurd things that evokes real images and associated feelings when we see lunatics in real life. Noomi carried the role out exquisitely. I did see the potential for that particular ending occurring as part of the 'plot twist' but my gf protested and claimed it was too far out to believe. However as the movie progressed, we're given more and more clues that may fit the picture.
The movie is quite slow at times, albeit, the ending was executed in quite a spectacular fashion that invoked a 'wow' effect from the crowed and saved the entire movie. Well done~!