As is often the case with these old modules, you will find a lot more content herein than its page count would lead you to believe. This is one of the very first module I ever played and therefore, my rating might be biased, but I think that no matter the rule set you are using, this is a good example of an adventure adapted to beginner GMs.
The first part of the module provides guidelines on how to run the adventure and how to add your own material (end of the book). The second part presents the Keep, the place where the characters can resupply and gather information as well as hire help to explore the Caves of Chaos. The third part is a description of the Caves of Chaos and its inhabitants.
The adventure is pretty straigthforward and does not necessarily contain surprises, but it is a solid classic in which new players can learn how to play the game and veterans reminisce some of their first experience. I really enjoyed reading it one more time!
[5 of 5 Stars!]