Unlikeable characters but mostly entertaining

Rating: 5/10 (15 December 2014)

I watched this based on some "best movie of 2014!" comments but it wasn't the dark, brooding mystery I'd expected based on some previews. It had an almost campy feel in too many parts and went on at least 30 minutes too long.
I generally don't like plots driven by psycho characters because they're too easy to do, but this was a twist on the usual psycho kidnapper angle and I won't give that away.
The problem was that too much seemed improbable after a point, and it began to drag, but the narrative compelled me to keep watching. Decent movie but hardly great. And I wouldn't call the ending satisfying.