I am blown away by the Quality and Quantity of the player options presented in this book. From the best Skelemancer I've seen in the Bone Domain Cleric, to a warlock who's patron lives in their magic hat, amongst other whimsical and wonderous choices. The races presented here are similarly well though out my personal favorite being the Necromatic Gnomekin called Black Hats. If you are looking to introduce a heavy Fey element to your games, I cannot recommend this enough.