Awesome and open-ended story-game. The core mechanics are more like Fiasco than Dungeons & Dragons, with cards used to help decide an occasional outcome or mix things up. Enough people have described the beauty of the game, so I'll leave off on the description.
One note: There is A LOT in this book. I think it could be edited down to about 50% of its current content and still be full. Pages 11-85 are worldbuilding, which is fun to read, but most people who sit down to play this will not have even glanced at. Then you have a full 24 pages on The Character. There are no character stats. Just sayin'.
I have yet to play this game but I can tell already that my RPG group will love it. I gave it a full five stars. Just be aware of opening this book and flipping through about half of it to find the information you need.
[5 of 5 Stars!]