It is a small one level dungeon that requires both thinking and hacking. Tim first ran Dwayne of Gamer's Closet and myself through this several years ago at the start of one of Tim's fantasy campaigns. I remember commenting that this felt like a classic dungeon where not only we had to fight but think our way through many of the rooms.
Up to that point our fantasy campaigns were heavy on politics and conflict between different groups in society. Knowledge Illuminates forced to relearn skills that we haven't used in years and it was a blast. The ensuing campaign was great and this dungeon got it off to a great start.
Remember like so many dungeons in our campaigns (Tim, Dwayne, and myself) the real prize isn't the treasure you get but the dungeon itself. It made a great base for us for much of that campaign.
Note that I did the maps both an area map and the dungeon map. The module is written for Swords & Wizardry Core Rules and usable with all older editions of the world's most popular roleplaying game.