This is one of those movies that makes you question reality. I had to go read the spoilers in the comments to actually fully understand what had happened. Not predictable at all.
How do we deal with pain and guilt? We all deal with it in a different way, don't we.
The cast was very well chosen and they each fulfill their roles perfectly in my opinion.
I thought it was going to be just another ghost story but in the end it had a lot more to it. There were so many questions and twists and turns, that I couldn't exactly keep up. But the story kept throwing you off. Just as you think you had it figured out it to another turn.
I really really liked it although I had to go read up on it a bit and when I had it figured out I realized how brilliant it was.

If you are looking for something unpredictable this one is for you. My brain was on fire trying to come up with the next solution.