Well,
With 2 Girlfriends are it's just about right
, 2 couples are too many.
Bed below is one double mattress, up top is perfect for a little one or two that are old enough where they can't wait to get up there and you can trust not to fall down.
But how mant do you want in a van? You know how it is. If you have 3 kids you need a suburban to get to school and a motorhome to travel.
I would guess most of you with Sportsmobiles are realists that know a van is great for a couple and that's the best.