I didn't like this product at all.
I really like Dungeon World. I've bought two other settings, both of which were very imaginative and fun.
This was just flat and dull.
First off, the cost versus the size. I take some ownership for this... I didn't look carefully to see that the approximately $40 book including shipping that I bought was about 100 pages. And describing it as 100 pages doesn't do it justice, as the pages are teeny-tiny. If this was a standard size book, it'd likely be about 50 pages. Which would be criminal for $20, let alone $40.
And the book is boring! The description of the book on DriveThruRPG was evocative, so much so that I purchased it. When I read it, though, nothing about it excited my imagination.
And some of the stuff in the description that sounded pretty cool, like giant pseudomechs piloted by dwarves fighting humans magically bonded with giant bones, have only the most superficial of descriptions in the book.
This book was bad. This is probably the only time I bought something on DriveThruRPG that I wish I saw at a store and skimmed through before deciding to make a purchase. I would dearly like my money back.