I really enjoyed this movie. I didn't know anything about the true story and had not read the book it is based on, so I don't have any complaints about accuracy and I didn't compare it to the book. So from the point of view of a simple movie watcher, it was a great movie.
The cast, locations, costumes, sets etc. were all great. The story was very enjoyable and it seemed quite authentic to its time period.
With a running time of 2hr 20mins it could have ran the risk of being long-winded and boring, but it kept my interest the entire time. I didn't think it felt like a long movie.
I'd only seen Charlie Hunnam and Robert Pattinson in a couple of movies before this, but I think they played quite different roles to usual and were both very good, as was the entire cast.
If you're not going to get hung up on historical accuracy and just watch it as a movie than I highly recommend giving it a chance.
