We played this today and had a lot of fun.
The group managed to kill the vampire queen, though one character became a vampire himself. He is not as evil as she was though, he only drinks the blood of highwaymen and murderers and their ilk.
The troll in the ice puzzle was very popular with players, though they did not come up with a solution, they just fought it.
One complaint: Shouldn't an adventure with so many nails feature a few hammers as well?