I Thought it was good because it highlighted a part of history few people know about. My mom kept saying, "did that really happen??"
However, I thought it was pretty sensationalist, as far as the gore. I like Scorsese, but this was a tidious movie. Yeah it had scope, something missing in a lot of movies of late, but I dunno--I don't the script made me care about the characters. I thought Cameron Diaz was a horrible bit of casting. This movie was just totally average in my book.