Had the urge to read it again right away, which for me is often the sign of a five-star. Not a lot of plot, very much about the individuals that make up the two couples. Loved that I was kept on my heels, never quite sure what was going on - which works because it is intentional (as opposed to just bad writing). Thought the narrator, one of the main characters, was great not because he was particularly likable but because he was kind of clueless, a little superficial, and not completely reliable.