An interesting game system. I like the beliefs, instincts, and goals that run through all of Crane's games. This one also introduces a heavy dose of player agency with full-fledged "player turns", where they get to direct the flow of the game. Some of the gameplay looks very alien to me because it's so focused on player-GM interactions (and so little focused on tactics), so I have some qualms about running it, but I'm willing in seeing how it goes. 
 This is also an entirely beautifully produced book -- not just in the excellent Mouse Guard art, but in the whole design of the game.