I ran this at Tier 7-8 at Gen Con. This felt like three quests and a special got together and had a baby. Echoing the thoughts of many, it did not feel epic enough to warrant a special. Each part was a fine story that would have made a decent scenario if expanded a bit. There didn't seem to be enough time to do the encounters, but I think that was a Gen Con problem rather than a problem with the special. It also may not have helped that for me, it followed Assault on Absalom.
This scenario was fantastic in every sense. The roleplaying was vibrant and dynamic (mostly because of the table I was playing at, but still). There were a number of open-ended situations that called for ingenuity on the players' parts, but could also be solved straightforwardly. The combats were diverse and exciting, offering some nice atmospherics and mechanical crispness. And finally, the pregens were absolutely fantastic. I played 322 and used all of her resources perfectly. I can't wait to run this.
I liked this scenario thematically and I thought it introduced some fascinating mechanics. However, these things did not play out well in practice. The party I ran it for responded overwhelmingly negatively. I want them to keep trying to make new and inventive scenarios like this. This one was just a bit of a misfire, but a well intentioned misfire.
I thoroughly enjoyed this as a GM. I like that, in the vein of Library of the Lion, the scenario was less focused on combat. Murder hobos will NOT like this scenario. I liked playing Lander, especially the party's reaction to him. As I prepped, I was looking forward to running one of the random encounters, and it did not disappoint. Like others have said, this scenario is more dependent on the GM enjoying himself and filtering that enjoyment to the players. I like to think I succeeded in that.
I liked how this scenario was set up mechanically. The encounters flowed very well into one another. It walks a fine line between making things obvious and obfuscating, occasionally swinging one way or the other. The story was good (I can't tell how good since I don't know the lore very well).