Parents need to know that this is a very violent movie with many character deaths. Characters smoke (one who gave up smoking years earlier takes a cigarette to relieve stress). Characters have alcohol and drug abuse problems and some characters deal in illegal pharmaceuticals and cocaine. Characters use very strong language.
So the main reason I rented this movie was to see Brian Van Holt who plays Dunbar. I thought it would be really horrible, but I was surprised. While it is definitely not Oscar worthy, It was pretty good. The twist at the end is also great.