This is a fantastic module and I can't recommend it highly enough. I am currently running a group of 11-12 year olds through it for an AD&D campaign and they are having a ball. However, the politics between the various Fey factions and the brilliantly described rooms and inhabitants would provide a great scenario for young and old alike. There are many sessions of fun in this large and well written OSR module. I bought this module after listening to the Roll For Initiative Podcast review (see Vince's comments and link to the podcast in his DriveThruRPG review of this product).
[5 of 5 Stars!]