The single player campaign is alot of fun but the game still suffers from some texture pop in with Radeon cards as of December 2011, hopefully it'll be fixed in the future.

If you want to play an Open World Western RPG that plays kind of like Deus Ex, you'll love this game. The game was very buggy at release but with the unofficial fan patch by Wesp5 (With an option to install bonus content removed from the final game), the game runs with almost zero problems.

Casual enough that you can pick it up immediately with some bits of complexity to keep you playing.