In regard to this review, keep in mind that I have not played CoJ: The Cartel. Not that I heard great things about it...
The two other predecessors, however, I have played and finished.
The first thing I would say, if you are a fan of the series, is to divert your expectations. The first two games both were stories that attempted to, and perhaps succeeded, into gripping you into their narrative. A heart clenching story of vengeance and/or a lust for a haunted treasure.
In comparison, Gunslinger's story seems like a mini version of it. A simple adventure about and narrated by Silas Greaves, spoken in the context of a Saloon like he was a Cowboy telling a tall tale.
The interesting thing done here is how the story impacts the game, whereas it's usually vice versa. Your audience at several points takes over the narration for a moment, telling how they heard an event in question went down.
And you play it all out, in a non-forced manner, taking their narrated path through the level. Eventually Silas will cut back in and tell how it really happened, winding back time to let the player cross through the level that way.
It's a very impressive, if not unique way of telling a story in a game.
The story itself, due to this, often comes across as a bit light heartened. It feels like it's lacking that darkness, that grit. But let me tell you, it eventually does come around, as Silas tells the story of his life as a Bounty Hunter in his quest for Revenge, and how he got around on starting in that line of work.
The array of guns may also seem simplified. A total of seven firearms and dynamite as throwables. It seems like that's not much, but for a story of this length, it seems enough. By the time you've gotten well comfortable and skilled, you'll have levelled up plenty and gotten around to a nice build to complement your weapon of choice.
Talking of Levelling, the game makes use of three skilltrees. They mainly befit the Archetypes of Gunslinger, Ranger and Trapper. Which simply means Pistols, Long Range and Shotgun/Dyanimite. Each skilltree awards you with a stat boost and pretty skin of a specific weapon halfway and at the end of the skilltree. Each tree has at least two unique skills that make you an even deadlier man, and the weaker skills tend to have some synergy going with other skills. Again, it's not very extensive, but enough for a game of this length.
Combat wise, it feels pretty good. The guns have weight to them, and fatal hits feel very satisfying. You have regenerating health, but so does the enemy apparently. You can fire two bullets in their chest, but if they find cover, those bullets can be considered wasted.
I played this game on Hard, which especially urged me to make good use of cover. The enemy will not relent, and is quite intelligent compared to some titles. They take cover the moment you are spotted, move to another one if their current one proves not good enough, and they seemingy try to outflank you when they have the numbers. I was kept on my toes quite a bit, and every enemy felt like they could end me very quickly if I didn't pay attention.
Overall, Gunslinger feels like a smaller (not necessarily stripped-down) version of the first game and Bound in Blood. But those were also full titiles, while at the time of writing this game is sold for 15.
So all in all, I would say that, with rational expectations, you'd very well get your money's worth.
Call of Juarez: Gunslinger seems like a pet project treated with the love and magic of a Call of Juarez story, but smaller. If a typical CoJ story you are after, you might have a good time with this 7 hour game.