We've been thinking that the house really needs more beds. We'll have at least 7 guests over midsummer (and I suspect that number will rise).
We plan to sleep 4 kids in Grant's room (2 up, 2 down), and at least two more in the guest house. A sleeper sofa will give us a couple more beds, which will come in handy.
The problem with a sleeper is that they're a lot more massive. I kind of like the look of the Kramfors instead of this one (the Månstad) but practicality is important, probably more important than design...?