I really wish I could give this module a higher rating, but it was abysmal to run.
The entire adventure plays like an extended cutscene. I was basically forced to railroad the players so that they would actually make any progress towards unraveling the mystery, and by the end of it the identity of the attacker was still unknown to them.
The players latched onto random rumors that were given out in the beginning as red herrings, fixating on them almost to the exclusion of the main plot.
The rumor about the Burgomaster's taxes backfired when one player literally said he would stand outside the Burgomaster's mansion for days on end until he decided to engage in discussion.
Avoid this module. It's not good.
[1 of 5 Stars!]