Quite firm but comfy. Says it's a double but the measurements are more like a king size plenty of space. The instructions are utterly uselsess. Must have been photo copied from by a printer with next to no ink so had to download the instructions from the product information. Only other complaint is that the holes drilled through all the mounting points  have fabric pulled over all of them making it a bit tricky to locate the bolts. Other then that very happy it's brilliant sofa bed