I wanted to like this book so badly; everything I'd read made it sound creepy as all getout and therefore right up my alley. But I found I couldn't connect with the setting or the characters, so all of the creeping horror and building tension was lost on me. While it was mildly unsettling at times, I never really felt scared while I read this.
The twist at the end was also highly disappointing. Without spoiling anything, I found that the use of mental illness as a motivation for the villain to be both cliche and playing into the unfortunate stereotypes about mentally ill people. It felt paper-thin and insulting to people who are dealing with psychosis, etc.