I really enjoyed this movie a lot. It had enough twists in it that you just don't know what's going to happen (and I won't tell you). I think the battle of wits between the businessman and the kidnapper is what really did it for me - it was great; a game of gambling with high stakes and unpredictable results. It was fast moving enough and had enough suspense and surprises in it that I painfully held in the large soda I drank for fear I would miss something.
Dissenting Opinion: Thirtysomething female didn't find it as surprising or suspenseful as I did and gave it more of an 8; she thought the main characters were not too well developed.