I found this adventure to be a satisfying conclusion to the series. By the time we were 10 adventures in, my players were taking bets on what would happen. Most people thought it would go horribly wrong and destroy Sharn somehow, but they were split on whether it would because of an accident or miscalculation, because the Provost was secretly evil and was planning a double cross the whole time, or because a third party would hijack it for evil. As soon as the birds started talking, they were all like, we knew it!
Anyway, the adventure itself takes you all over Sharn through several mini-adventures as you attempt to disable the various artifacts powering the machine, each of which has its own twists. It's full of callbacks to the earlier adventures in the series. There's a nice variety of puzzles, combat, chases, and social encounters, all culminating in an epic final confrontation in two stages and three dimensions. I wouldn't recommend playing this one as a one-shot, but it's an excellent finale.