The characters, the costumes, the scenery, the music, the way they speak and act. This is not Montana. I may have enjoyed this much better if they called it BC or Canada instead or if they spent any time in Montana seeing how Montana people dress, eat, speak, and behave.
I am originally from Big Sky Country (Montana) and this is not Montana so it was very distracting to me and hard to get in to the story when all I could think about was how off they were portraying the state.