The hobby would be in a better place if more designers read this guide, Way too much bs going on across OSR kickstarters still. At least we got a handful of people like Kevin who are amazing about running their campaigns and never disappoint.
This book is really helping me flesh out my Forbidden Lands campaign with much more variety.
Like any TTRPG book it might need some minor errata but it's one product I would easily recommend to any FL DMs; both for its style/presentation and its content.