This is an excellent GM-less game; it feels very freeing, and the meta-roles (and the way that hazards *react* to player attacks to both deal and take damage) mean that the players don't flounder waiting for someone to take initiative to move the action along.
However, I wish it had just like, a spoonful less crunch - I don't like the Target Number table for the Flair checks/powers, it seems like a very numerical spreadsheet part of the game where other things feel much simpler (roll some dice, see what lands 5+.) It also seems like Boons and Loot could be combined to simplify things, but talking this over with some friends, I understand why they're separate - but it feels like some stuff could be stripped down to make this just a little leaner and simpler to play.