Entertaining until it starts to have holes in the plot.
Then it became stupid, sick and twisted.
The ending beggars belief, and we are concerned for the long term effects it may have on the "killer". In real life. Playing that role is hard enough, but what does it do to the psyche?
I recall instances in the past where roles played by actors have had devastating effects on their real life.
I wish I could UNSEE this.