It was hard and flat, even when folded in half! We ended up sleeping on the Ikea fold down sofabed, which was good enough. I think the owner would have brought over an extra foam if we had said something though, he did express concern when we told him at the end of our stay.
Creo que el propietario nos hubiera traído una esponja extra si le hubiéramos dicho algo, aunque no se mostró preocupado cuando se lo comentamos al final de nuestra estancia.