We've been using this in our games and it's fantastic. To be frank some of the posters here have really dragged this thread down, it's an optional system, seriously get over it. It's clearly a homebrew framework and can't just be dropped into a game as is. It takes a little squeezing depending on the classes you have in your games and that's just what it's meant to be.
We've been using it with mythic rules as well as wounds/vigor rules and we're having a blast, it's bread new life back into our games again.