Well written and designed to instill anxiety in the situations it puts you in. (That scenario when someone from your childhood instantly recognises you while you're left squinting at them awkwardly trying to be sure who they might be.) The ending kind of seemed to jump out suddenly until I figured perhaps it was never a real haunted house after all and a lot of this was in the reader's mind as the way they were perceiving things as they try to navigate the stressful situations they need to go through to their appointment?