There has been well-documented commentary about the producers of The Express having taken liberties with some of the facts. While this is true, none of those liberties really obscure or confuse the Ernie Davis story. If you want to see a more factual presentation of the Ernie Davis story, check out the 30-minute documentary about Davis in ESPN's SportCentury series. It is very well done, too. You'll find that in this feature film, there is not much significant straying from fact.
This was an excellent film. In the theater where I saw the film, the audience was so into the movie, particularly the football action, that some folks actually cheered when Davis would make a good run or score a touchdown. The director and actors did a great job of hooking the viewer into the intensity of the games. Great story without getting too hung up on the national politics of the time. Highly recommended.