I don't think I have given a five-star rating ever. But, hey, never say ever. There is always a first. I am quite surprised people were disappointed with the ending. Probably one of the best I have seen since Inception. The best part is the simplicity of conveying everything instead of choosing to convolute the plot by trying to outsmart the viewer. I will definitely be rewatching this again. Simply blown away.
It is definitely a slow burn thriller but, boy, does it burn bright!