HW is a quite enjoyable turn based western shooter with supernatural elements. It is simpler than other games from this genre, but not too easy. You have 3 difficulty settings to adjust it to your level of skill.
The main game offers several campaigns. Each campaign consists of a strategy map where you plan your next move and decide which location to go to next. Some locations just advance the story or offer stores to buy supplies and equiment, others lead to tactical encounters.
The campaign-stories are not totally awesome but quite enjoyable. The setting is fresh and offers a nice break from the typical fantasy or sci-fi setting.
With the main game and the DLC it will take around 20 hours to finish the game. I am not so found of the DLC though, it heavily recycles assets and has a mediocre story with annoying missions. I think it is only for hardcore fans.
If you like games like Xcom, HOMM, Mordheim etc. you may give this indie game a try.