The guest room that doubles as a home office that doubles as a spare bed situation is one most of us are managing. The sofa bed should be the solution. Too often it is the compromise that pleases nobody, a seat that feels like perching on a pavement and a bed that guarantees a bad back by morning. We’ve spent a long time looking at what actually works in both modes, because a sofa bed that functions well as a sofa is not optional. That is where it lives three hundred and fifty days a year. The fold out mechanism needs to be simple enough that a guest can manage it alone at midnight. The mattress needs to be thick enough to sleep on properly. The proportions need to look considered rather than functional. These are the ones that clear every bar. You don’t have to choose between a sofa you want to sit on and a bed worth sleeping in.