Two things can be true at once: Sleeper sofas are a feat of engineering, and they can be the bane of your existence. It’s a marvel to fit a bulky piece of furniture inside another, equally bulky ...

To flip the sofa to a bed, it's quite simple, opening up like a billfold wallet. Underneath the sofa there's a tray on wheels which you pull out to rest the extended half of the seat cushion on.

From the classic sleeper sofa that pulls out to reveal a full-size mattress, to the space-saving futon sofa bed that folds ...

Some sleepers might prefer a couch without the dreaded support bar propping up the bed in a pull-out sofa, while others need a real springs-and-all mattress rather than a bricklike futon to lay ...