Rest and Fly, Arlanda, Stockholm
I stayed at this place one night last autumn. Admittedly I booked late, so ended up with one of their less small (can't really call it larger) cabins and thus more expensive, and it was only me, but I think certainly for one, unless desperate, it was pretty poor. Much of the above, eg between flights, with a whole family etc I can relate to, but my main grouse is about the poor bathrooms. At the price I paid I felt that at the very least there should have been shower cubicles, offering a degree of privacy. I compare it with Travelodge, near Heathrow, where I pay £29 for a reasonably sized room, own bathroom, tea/coffee making facility, TV and a made up bed. So, I can see myself using Rest and Fly again, but only if that's really the only option as I certainly find them very expensive.