I'm sorry but this movie wasn't that good
In my opinion the relationship between the boy and his father was really weird. I didn't see them as father and son. I just didn't believe it (have other people have that experience?). And then there's the acting of Billy....really really bad. John Voigt is a good actor now but in this movie i didn't believe him. That's why i didn't have to cry, i didn't feel for him. For example the scene where he sees his boy again after going to prison. OMG i have never seen a less believable performance.
Sure the last scene was sad. And the boy can act, and cries believable. And that's a good thing because he cries about 80% of the time in this movie.
I think thats some of the reasons it only gets a 6.1. And even that is too high.