I played in this LARP with Jennifer at Gen Con in 2009. They're running it again this year and I've volunteered to help them 'promote' it. This thing was awesome in a hat box. Here are six things I liked about it:
1) The out come is HIGHLY flexible. You as a player, can make a huge difference. It was obvious looking at the design that there were probably 10-12 different story lines, each of which could end a different way, and each of which was somewhat independent of each other whilst still affecting the other story lines.
2) All of the parts matter. There are no small parts in this thing. It allows everyone to do some really cool stuff. I didn't see anyone looking at their character sheet and going, "Well that sucks!"
3) The world makes sense. And yet at the same time it is extremely unique. It is obvious that the GM's have put quite a lot of thought into it.
4) The people running it are cool. They'll take the unexpected but in many cases they've also already PREPPED for the unexpected. This is their baby and it clearly matters to them, which only highlights how awesome it is that they're so flexible about what the outcome can be.
5) The system rocks. Its very simple. Its an excellent blend of crunch and yet it allows for creative flexibility in interpretation of how to do things.
6) Most important of all, the system and setting are very 'newbie' friendly. I've been doing LARPS for years and yet I had a blast with it, while my wife, who had never played a LARP before was also mastering things in a few minutes.
If you have the chance, I highly recommend playing this or the sequel, the King of Feldra at Gencon 2010.