Pros:* Epistolary style* Unreliable narrator* Gothic horror - think "Turn of The Screw"* Beautiful proseCons:* Slow build* Unresolved story points (i.e. Mr Davies)Because this is the journal of an unreliable narrator who is slowing going crazy, you never really know what has or has not happened. But you also get beautiful sentences like, "The girl was self-absorbed, but she was also excruciatingly alive, as if had been born without skin."