Impressive game and guide to create derivative games. Nice book, easy to read, with meaningful examples, discussion on the game's design principles and suggested rule variations.

So far I have been using it for solo one-shots because it is so easy to outline a setting and mission and get playing. For the same reasons, I hope to be able to play this with a group soon. The change from "roll when there is a risk" to "roll when you feel it is dramatically interesting" completely modifies the way the game is played. This is probably why the concise action resolution rules work so well.