If you like Civil War history, you'll like this film. Not much action, very dialogue-heavy, but well done.
The only thing I couldn't figure out is why they had so many British actors in it, since the story was set during the Civil War. Really - "Mr. Tumnus" from "The Lion, the Witch and the Wardrobe" playing an American attorney. Really? How about Chief Miles O'Brien (Star Trek TNG) as an army officer?
It was just a bit odd.