Very excellent megadungeon, extremely easy to run and much more gonzo than meets the eye (although not quite to the extent of something like Anomolous Subsurface Environment or similar modules). Highly recommended

Fantastic megadungeon. I returned to the game after a more than 30 year hiatus to run this as a DM for my OSR group. It was very easy to run and very flexible and adaptable. Room descriptions, stat blocks and supplementary materials are simply excellent. Lots of strange magic items, custom monsters and a well thought out campaign world. This product along with various side adventures kept my group busy for close to a year. A great time was had by all.