1. It's a feel-good rags-to-riches kind of story.
2. It's a true story.
3. It's set in Philadelphia, near where I grew up.
Unfortunately, I was too busy to see it in the theater, and wound up seeing it through a happy accident, when the scheduled movie on a flight from China to Japan (The Lake House, which I had already seen on another flight) refused to play!
Simply, it's the story of Vince Papale, a man who played (American) football in high school but not in college, then while working as a substitute teacher and bartender and playing for a minor-league team, got a tryout with the NFL's Philadelphia Eagles and made the team, becoming the league's oldest rookie without college experience.
Papale's story is told pretty accurately, with only minor (if unnecessary) changes in the movie. Philadelphia is given a nice portrayal, and the actors and dialogue feel like people and language one would actually encounter in Philadelphia.
Overall, I really enjoyed this movie. It's nothing too terribly deep, but anyone familiar with the Philadelphia sports scene will find a lot to relate to - and a lot to laugh at. I'd recommend it to, for example, my dad.