Ahh yes, the dungeon more commonly known as "corpse dump".
If you don't feel like putting the time into it, you're not missing a whole lot. The loot is bad and XP is meh. The zombie part is really the better part of the dungeon for xp. I once convinced people to help me get the key and run it with me, we got no loot and the XP for most of it was real bad, and the group said screw this during the final parts of the vault or whatever it's called.