Bone Tomahawk: 7/10
I enjoyed this but I think your enjoyment of it probably depends on your opinion on the Western genre in general. I love period pieces so I just really liked the whole vibe of the film and found that allowed me to enjoy it even when it was slow-burning.
I don't think the savages were particularly interesting villains and I found the conclusion to the movie pretty subpar. Actually, I think I preferred the slower portion in the middle of the movie when the four were on their journey, the strengths of this movie are in the dialogue and building a believable Old West world rather than the conflict with the antagonists. It's a better Western drama than it is a horror.
It's entirely possible that my view of the movie would be lower if it was set in the modern day since the primary driving force of the plot wasn't that compelling, but the time period it is set really added to me getting into the story and elevated the film beyond what it could have been.