I saw Amazing Grace yesterday. I found it very moving, and it's the best film I've seen in a long time. The acting is superb, especially Ioan Grufford (Wilberforce), Benedict Cumberbatch (William Pitt the Younger), Albert Finney (John Newton), Michael Gambon (Charles Fox).
I found it a refreshing change to watch a film that is based on dialogue rather than gung-ho action as a lot of movies are today. The message in Amazing Grace is very powerful, and I especially admired the emphasis on William Wilberforce's faith, convictions and beliefs.
I would rate it 9/10.