I really liked it and may use it for a halloween game. It looks like a really cool take on the classic haunted house story.
Now for a possible Ghost Story spoiler question...
On page 10, there's a note from Billy that says that the paranet may not understand the nature of ghosts correctly if the events in the adventure are interpreted correctly. Can that be considered Dresdenverse cannon?
Ok. So I ran this today as a convention game and I think everybody head a blast.
I especially liked the questions that make the players acquainted with the characters and with each other. An other great thing was that you can start pretty much right after you have explained skills, went through the questions and set some aspects. Half an hour prep time with four of the players being complete strangers to DFRPG and two being complete strangers even to the novels ... very very enjoyable this.
Spoiler alert: Even the things I was a little worried about like the players spinning their own ghost stories on short notice and telling them to the group went exceptionally well.
Unfortunately one of the players head her backpack stolen right from under our noses and we had to abort the game before we could enter the third act. I feel like it would have even gotten better and scarier at the end. I strongly recommend you trie this out sometime. Perhaps even with some people who usually don't roleplay or haven't any understanding of DF or the RPG.