When I played it with a 5th level character, I would have given it 3 stars, but after judging it and killing half the party, that 1-star experience makes the average a 2-star rating and that's being extremely generous. I had high expectations for it after #5 Mists of Mwangi, which shares the same location, the famous Blakros Museum, but it's less role-play focused and more roll play intensive. I probably should have advised the 4 player table of all 3rd level characters to play sub-tier 1-2, but essentially the same table had just cake walked a sub-tier 3-4 mod. In every fight I dropped at least one PC into the negatives and since they had 2 clerics this was fine until the deadliest encounter finished them since their offensive capabilities were insufficient to overcome her defenses. The two surviving PCs had to retreat and escape the museum back to the Pathfinder Lodge unsuccessfully completing the mission and partially completing their faction missions. I guess the take home lesson in the future is to play down with a table of 4 (or even 5 players) if none of your PC levels are in the sub-tier range of the higher sub-tier.
