All I can say is WOW! This is an awesome Mega-Dungeon adventure! It very much captures the old school vibe that I love. The art is great, the new monsters top notch and appropriate. I'm looking forward to running this for my group at some point!
My only complaint is the way the maps are done, cut in half in the back part of the book where you have to cut them out and piece themtogether, but the author has said he will be releasing updated maps soon, and to be honest everything else about the book is so great that, the maps are a minor issue for me.
[5 of 5 Stars!]