I think it was a 'potentially' great movie that turned into a not so good/boring one. It's a pretty close adaptation of Robert Parker's book (he writes the Spenser and Jess Stone novels) and he's gotten fixated on women like that over the years. It gets old after a while, and I think bogs things down along with all the "we're tough" chat. If Ed Harris (who directed) had stayed with the pace the flick began with, it would have been something else. I'm sure there's a sequel in the hopper since there was another book with the same two characters. The gal isn't in that book, but the 'tough' chatter escalates.
That said, I'm such a nut for Westerns that I really enjoy nearly all of them and though I'd not see this one again, it was OK for what it was.