I've run this twice now, at a convention and with friends, and had a blast each time. Building a kenn with players gives you instant themes to incorporate into the game. My first group lived in a swamp and decided their culinary delicacy was anything dry, so they had to pay the rent on the "magical" dry box which had been repoed. The 2nd randomly decided to worship Wile E. Coyote so I sent them on a Looney Tunes-esque quest to find the fabled ACME warehouse.
My only problem (from a GM/TP perspective) has been the side quests. Introducing any more than one feels like I'm shoehorning, but that may be my lack of GM experience.
Overall it's an awesome game. Well written for newbies & experienced players alike, doesn't have too many mechanics, and doesn't feel like it's missing anything.