This is one of my favorite implementations of a Powered by the Apocalypse system. It uses the Weak / Strong / Grand scale of challenge and success that I first encountered in Far Flung. I enjoy this because it enables storytelling in an intuitive way, one that fits the rising arc of escalating danger so common in stories of heroism. The "classes" feel authentic, and when I use the system I strip out the animal-aspects and just let folks assign a combination of +2 / -2 as they see fit. You could play out any number of stories and movies, from Seven Samurai to 13 Assassins to Shogun. It would be easy to file off the serial numbers and play a game of The Lord of the Rings with this; once you understand the system it lends itself to telling those kinds of stories.
Like any new system, it takes a hot minute to understand how the roles fit together. At the begining, the character abilities feel a ittle mechanically indistinct. At first I worried this would be a little boring, but it actually helped me see how the different core abilities interacted, gave the opportunity to see how Setbacks and Story Points work, etc. After a few games the special abilitis start to crystalize and the game really hums.
That said, you need to bring your own story and play this with people who want to tell a story. The mechanics will facilitate it but the narrative has to be brought to the game and all the players work together to tell that story (e.g. it wouldn't be easy to just drop them in a dungeon). If you want to tell an exciting, sincere story in the Warring States periods this is a fantastic choice.
[5 of 5 Stars!]