I didn't really care for this story. Technically I found it sound, and the acting was good, but I have some picks about the story.
First of all, I didn't feel like I got a good enough window into the main character to establish why I should care about him. So he knows about cults and idolizes this Brose guy. So what? What makes him special enough for me to care about his existence? Toward the end he redeemed himself, and I liked how he became Brose's replacement, but I never really felt strongly enough about him as a character.
Secondly, while I know cruelty to animals is an easy way to establish someone as being evil, I don't really like reading it, not on a personal level. It just turns me off. Some people hate certain words, some people won't read a story if it deals with certain topics. If I had known there would be a crucified cat, I might not have listened to the story at all.
Thirdly, Adrian was a useful character, but the fact that he fell to the floor, whimpering, when the monster entered his dreams, and yet the main character only was slightly disturbed... I don't think I felt the true horror of it. It's like the main character had too easy a time of things because he wasn't as good at this stuff as he wanted to be.
So, in short, I didn't really like it that much. Maybe it's because I don't have a good-enough grounding in Cthulhu lore to really grok the story.