Concussion is definitely not for the NFL buffs as I thought it would be. So be careful. But anyway, the movie keeps you engaged for sure. Its definitely worth watching. But frankly, I would place this movie in a 'one-time watch' category. Will Smith has definitely done justice to the role. He plays Dr. Bennet Omalu, and i would describe his acting as precise. Precise because no one knows Dr. Omalu for sure unless you are familiar with the 2009 article( ring a bell?). So, Concussion is basically a good movie. Will Smith fans will definitely love him in this avatar.