It feels like a lot of effort has gone into this product. I enjoyed the evolution of the 'races' in this book 'genus'. My favourites were the Homullus and Hollow.
I'm looking forward to giving it all a try! The 'Multi-classing' isn't a thing, but it's the closest approximation to the character building, and it looks fun and allows for some cool builds to be made! Overall 4.5 rounded up to 5 :D