This is simply a very solid piece of work and it's worth reading. Here's what you'll get:

1) a rather unique "Old West" setting with a strong focus on portraying the harsh reality of trying to make a living in the young United States

2) a story of brotherhood, revenge and the pursuit of happiness, which is not exactly new or unique, but very well exercised here.

3) fantastic art that manages to illustrate the atmosphere of the story perfectly

4) a concise story that proceeds from start to finish without any major filler episodes. Instead, the plot moves forward rather swiftly and you'll find yourself at the end of the 5th volume in no time. Still, the story doesn't feel rushed either and, thanks to different settings and a few sensible timeskips, the manga actually manages to paint a broad picture of the Old West in this limited amount of chapters.

5) the author also uses a few pages here and there to introduce a couple of historic facts about the Old West that become relevant in the following chapters, thus offering a little history lesson which blends in well and really adds value, I felt.

Reading this manga felt like watching a good old Western. You quickly grasp the premise, you have one major plot that will be resolved in a somewhat foreseeable way, you get a couple of great action scenes along the way and the whole thing doesn't take up much time to consume. What's not to like?