This is a nice little down-and-back side quest with some suggested hooks that are pretty easy to incorporate. I like the theme of the dungeon and most of the monsters fit together well, but the danger level of the encounters swing wildly, especially the boss encounter. I took one look at the CR20 critter and swapped it out with something else.
It's also not much of a "thinker's dungeon". Hack and slash is the name of the game and the one 'puzzle' in the whole thing is really just a very high perception and investigation DC, which is not what I expected for this price point. All in all, it took quite a bit of adjusting before I went live with it, but the maps and descriptions are really well done. Based on other reviews, it looks like it has been polished up a bit from initial release.