I ran this yesterday for a party of 5 level 2 players (Fighter, Ranger, Rogue, Druid, Warlock) and we had a great time. This is an exceptional adventure with a great mix of combat, exploration, and roleplaying. Offers the DM a chance to play several amazing NPC characters; my players loved 31 Squared, Tobbi, and Razi. The story manages to be both surprising and logical, and is refreshingly different from standard fare. Playing time was right around 4 hours at a relaxed pace. The players were never in any serious danger of losing any of the fights (well, except the unwinnable one), so I might consider beefing up some of the enemies if I ran it again (they also had a couple of really lucky rolls early in the final fight). I did cut the mud mephits as it felt like one combat too many between the wasps and the ziggurat fights. Highly recommended.
[5 of 5 Stars!]