DH and I are, for the first time, having to sleep on our spare bed, which is a fold up ikea sofa bed thing. People have been staying with us for years and no one has complained.
We have nice guests, very nice. 'Cos oh my goodness, it's awful! It's so hard, and has no give. We have bought a convoluted egg shell type mattress topper and it has made a difference but not really enough. It's still hard.
I have googled and found other types of mattress toppers like memory foam etc, but they are quite expensive and they look quite thin so I wonder how much of a difference they could possibly make.

Do you have one or have you used one? Are they good? Have you got another suggestion for us?
TIA.