I absolutely adore this one shot. I've run it for six different groups, and every one of them loved it. The writing, the mystery, and the horror aspects make this the type of one-shot you run for friends you want to get hooked on D&D. My only critique is that almost all of my players guessed the BBEG the first time they met. My advice to future GMs is to have the party meet the BBEG somewhere on the street for their first encounter. This can lower suspicion, even if you end up walking with the BBEG to get one of the suspects. Also, don't make the BBEG do a hard refusal when/if the PCs ask to come in a snoop around; instead, try an understanding and, "I've got nothing to hide but I'm short on time." approach.

10/10 would buy again.