I have heard from a few people that usually don't even mention movies that it's an excellent movie. I haven't confirmed that, but I figured it must be really good if they just bring it up in a conversation.
I saw the John Wayne and Kim Darby version when it was in the theaters. It was a very good movie. One of the best at the time, I recall.
If you haven't seen it and like cowboy movies, it's definitely worth considering.