In specific areas, rough places in the metal frame could actually cause an injury to the person sitting or sleeping on the bed.
Numerous say that this type similarly works as a bed and a sofa unlike other sofa bed which work better either as a sofa or a bed.

A great quality sofa bed must have layers of padding to prevent it from wearing on a brief amount of time.
Though it does not require much area, but prior to purchasing it make certain that there suffices room in your living room when the couch bed is stretched into a bed.