BEFORE YOU BUY
■ Sofa beds come in two main types: those with a pull-out mattress and concertina bed frame that folds up and is hidden underneath the removable sofa seat cushions; and click-clack models, where the sofa seat and backrest fold flat and lock into position (with a click-clack sound) to become the sleeping surface. Each has its pros and cons that are worth considering.
■ Pull-out styles look the most like a sofa and tend to