This was an excellent dungeon at an excellent price. It blends many different classical elements of the dungeon in an interesting way and it gives you a hook that can be easily used, though you can just as easily design your own. In my campaign, we used the hook as written, and that went pretty well with my group. A personal favorite of mine was having one member of the group describe an obstacle and another help solve that obstacle during the lead-up to the adventure. That particular aspect was brilliant for our group and one we will definitely be using again.
The art is servicable, especially given the price, and easy to take from the PDF and import into a virtual tabletop for use as handouts when appropriate. The map is easy to copy and hand-draw in, but I couldn't import the image directly due to the secrets being noticable in the player version, though I consider that a relatively minor issue.
For the price, this is a fantastic deal and the formatting is top notch so the prep work is very easy and gives you more time to think about what will be the most fun for your group!
[5 of 5 Stars!]