We've been using this supplement for a while, and it works quite well. It adds some customization to the character, without being too overpowered. It's also easy to slide into creation. All of the players in our failrly large group have enjoyed it.

This supplement contains a detailed system for inserting minor skills, which serve as areas of specialization, on top of the existing skill set in D&D. As a fan of skill-based systems I found the concept intriguing and the execution to be top notch. These rules offer the ability to drill down to detailed specifics for skill use without being overly complex, or damaging the existing skill rules.

Unfortunately, I can't say the same for the included crafting rules, which serve to jettison tool proficiencies in exchange for crafting skills, which basically seem to work as tool proficiencies already do, but with a different name. In my estimation, the crafting rules don't really add much to the existing engine.

Aside from a few typos, which have been brought to the creator's attention in the product discussion, the book is finely executed. Well worth the cover price!

Great supplement! Used it in my campaign and the players enjoy it. This is the kind of fleshing out of the core rules that 5e is designed for.