This was unexpectedly great. It's a little bit like Promethean, but actually practical for group play. The system is interesting, and gets out of the way pretty readily.
There is one thing you need to know about this book before you read it: it uses apostrophes to denote plurals. That would normally be only a passing irritant, except that an individual character is an Adam, and throughout the book, that is pluralized "Adam's". As many as 8 times on a single page, according to my search function. If yu're the kind of person who is bothered by that, and I sadly admit to being such, you'll want to make your peace with it early. Don't let that stop you from reading the book, though--it really is worth it.