Although I have never run it, this adventure is the one you want if you want to run a Mystara adventure in the Grand Duchy for experienced players. I can't think of a more detailed, atmospheric, engaging and entertaining published Grand Duchy adventure. Only Rahasia rivals this as far as the B-modules go. Proves the UK TSR guys really knew what they were doing.
On the other hand, starting DMs and players might find this a little overwhelming due to the level of detail and the sandbox style play, so would be best trying out one of the other B-modules first - B1, B2 & B9 are all good starting points.
Pleased with the OCR quality too. Thanks drivethru!
[5 of 5 Stars!]