The best thing about Air New Zealand's Sky Couch are they are designed to convert into a nice flat bed area (i.e. foot pedestals go up enough to meet the seat). I wonder what happens if someone steals your seats and it is a full plane with the spares scattered around in a few middle seats - what will the FA do then?

The worst part about a Sky Couch - if you're not able to see the load levels you may have just bought yourself 2 extra seats in unpopulated plane with plenty of free rows already.