It's about as inaccurate as film gets, and in this case the true story is a lot more interesting. It has a very weak lead, and in fact none of the acting is particularly great. What it does have though is a great score, by Ennio Morricone, and the action scenes are pretty incredible. Each one has such a visceral sting especially the epic shoot out at the train station. It's really film that gets away with itself mainly by just how good those action scenes are since the story and characters backing it are nothing notable.