This is a good way to begin an adventure path. The light-hearted start gives everyone a chance to feel for Trunau even if not a native. (Side Note: make sure AT LEAST 1, preferably two or three of you players a re natives - in my five person party only one was and it was a struggle to really get the others hooked). Following on is a murder mystery and then an excellent running battle which takes place through the whole town including chances to rescue various NPC's, which gives the whole thing a nice sense of urgency without being an excessively drawn-out combat.
The book ends with a much more standard miniature dungeon crawl which is still fun a flavorsome with some very nice treasure at the end! Consider changing the armor to suit your party best.
Pros: A good AP, lots of different things to do during the adventure.
Cons: Relies on players having an attachment to Trunau - otherwise, none.
Tips: Can be finished very quickly (my group took about two in game days to finish the book) but the story seems to assume at least a week. As a GM be wary of that.
Also - make sure your players are crystal clear about the fate of the final boss and the timing involved, it becomes important in book 2.