This is an excellent product. It is a clearly and concisely written dungeon with combat, puzzle, and RP encounters aplenty.

I ran this as a oneshot for four 6th level players. Don't expect to run this adventure "straight from the book" simply reading canned text; The background details are quite light, and you will need to spend some time figuring out a satisfying setup and conclusion. That said, the provided fluff is quite interesting and flexible. The details are rich enough to stoke your imagination, but light enough that you can simple discard them if you want to drop this dungeon into your campaign.

Our group was overleveled for the dungeon, so I can't really speak to the difficulty. The traps are certainly fun though!