Very extensive Adventure. A lot of Events, Enemies, Equipment, Riddles and all of that hold together with a nice story-line and several story-fixpoints. It is defenitely worth the money if you like the old fashioned "Choose your own adventure" books.
The authors try their best in creating a strong adventure, that will keep you occupied for several hours. They fill it with lots of sneaking, fighting and well written story parts. However it felt at some points very repetitive (... go down that way, fight enemies, go to the next, fight enemies, ...) And this repetitiveness really made me skip some encounters and tore down my motivation to keep playing this adventure (hence it took me months to finish)
The games system is a unique simplification of what could be considered classic DnD. This siplification makes the game very fast and easy to start. Only problem i faced later on was a classic DnD situation: You gain so many special materials, items and stuff, that it becomes increasingly complicated to keep track of all your modifiers and options. This counteracted the original intention of the gamesystem: to keep everything so simple, that you can compute everything in your head.
The layout is decent. The interior is kept in back and white. The illustrations are all well drawn - not to many but the right amount to support you reading the adventure.
Overall: Still pretty good!