Lots to like in this supplement - some of the NPCs really live up to the title and they would be memorable NPCs in any campaign. Some, not so much, for example Craggle is a goblin rogue and no different from what you'd expect a goblin rogue to be. He is more of an encounter than an NPC, same as Jarglefargle the Ettin, could be good for one or two encounters, but not a long term NPC. But plenty of unique characters here with interesting backgrounds.

One thing though, the author apparently doesn't use an editor, and I'd guess didn't get anyone else to proofread his work. If you are a pedant for grammar and spelling you are going to have a tough time with this.

But you know what, for the price you are paying this doesn't matter. In fact if you buy it give him more than the average price because it's worth it.