The rest of the adventure is just a series of dull traps. Even when there are very good excuses to use something other than the rogue's overtaxed skills (like Knowledge [architecture and engineering] to notice the odd hinges on the door), it's still just Search and Disable Device ad nauseum. Why are only bards and rogues allowed to use Decipher Script? Even the opportunity to let the PCs notice the heavy undersmell of acid and poison under the perfume is missed (apparently, it's just there for the DM...). One particularly ludicrous trap can easily be a TPK unless all the players guess which way to swim and do it in unision (despite the inability of terrestrial humanoids to coordinate actions via speech when inconveniently underwater).

And why is the map scale 1 square = 3 ft? (All the descriptive text describes the rooms in 5-ft increments, which means it makes even less sense.) Why does a 4th-level ranger mercenary have the Extend Spell feat (which he can't use), no favored enemy, and no armor? Why do enemies ambushing the PCs while they're down a hole in the ground have no missile weapons, or at least some guidance (like Climb DCs or at least a solid description of the "passage") on how to handle a fight while climbing out of the pit? What's the size of the new monster's breath weapon? What is the acidic touch special attack? For that matter, can't an average DM just glance at the stats of a medium water elemental and create an equivalent monster in about 30 seconds?

The worst Instant Adventure I've seen. Not even worth stealing from.