I've recently used adaptable NPCs in a campaign and found it inspirational and useful. The NPCs within gave me great ideas. I was easily able to scale them to an appropriate level by removing some skills or increasing hp. The creative combinations of features and attacks gave my players some great surprises, but still felt like they had a theme for each NPC.
I appreciated the gender diversity in the book although more diversity in characters would be nice in the future. I'm also tired of female NPCs being depicted in the same way from product to product. There were some small typos/editing errors, but they did not distract from the quality of the NPCs.
[4 of 5 Stars!]