I thought at first that this was another of my Netflix mistakes. I sometimes queue a DVD for fleeting reasons, and then, when the disk arrives, I wonder "why did I want to watch this one?" I thought the lead actor was insanely good. Even the parts where he sullenly has nothing to say, his body language spoke volumes. I thought he was perfectly credible as a wounded man-child, having been falsely convicted in his early teens of something that I don't think was ever specified.
The female lead was also the victim of undeserved violence, a battered wife. I liked the way the screenplay took a while to make that clear.
My only complaint is that there were one or two spots in the film where the pacing got really slow. Since these 2 characters weren't free to move around a lot because of the threats against them, there were many cloistered moments during which they could only speak - but then again, neither wanted much to talk due to their situation/condition.