I saw it in London a year and a half ago, and loved it. Initially I wasn’t sure I wanted to see it because I like dramas, not ghost stories or anything like that. But was sold when I read reviews stating that it’s a very human drama, even if with a supernatural twist. And when you see the ending, it hits you like a ton of bricks, and you realize that the ghost element is there to only hit you harder with the human element. I must say I predicted the ending 15 minutes before it came. But judging from lack of gasps at that time mark but that arrived when the ending arrived, not many people guessed the ending prior to its arrival - so it’s not excessively obvious.
I highly recommend it, but be prepared to be hit hard at the end.