I can say that ya for two adults it is definitely cuddle class. My GF and I are both 5'9 she is a twig and I am average sized and it was tight with the seats in front up. I dread to think what it would be like with the seat reclined.
We did sleep for 2/3 of the flight and we left the couch up sitting facing each other with our legs crossing and propped up against the wall / seat for the rest of the time. Now that was very comfortable and nice. We sail and are used to tight quarters so it was not a big deal, but honestly I don't think we would do it again. It was great when we were awake but not so much the rest of the time.