If you haven't seen this movie yet I encourage you to do so! Kurt Russell does a great job, as do the rest of the actors. It isn't too over the top, though a couple of liberties are taken with the story.
The best part of it though is the hockey action. It looks real. During the final game I was on the edge of my seat even though I knew how it turned out! The crowd in the theater was clapping when time ran out.