This book has a lot of great ideas in it. The charts are neat and some of he things you can do with them are just awesome; or they would be if so many of the items weren't so screwy. Many are just cut and paste jobs, errors and all, from earlier sources. Some beg obvious questions and clarifications that aren't provided and make little to no sense when compared with the "Core" rules.
My advice is to skip this book and wait for the next printing/errata; it desperately needs it.
Perhaps I've become spoiled but I expect a lot more from a Paizo hardcover than this.
