This made solo gaming click for me. Simple, but with descriptive hooks that fired up my imagination. I don't have the time for something complex, and something too simplistic wouldn't hold my interest, so this really hit the sweet spot and has got me excited to play again. It's bringing up good memories from playing D&D and then AD&D as a kid, I like how you can roll as you go, or design a crawl and run through it, or DM 1-6 players quickly and easily.