I thought this mattress topper would be the answer to making my sleeper sofa more comfortable, I was right! If you have the typical stiff uncomfortable mattress on your sleeper sofa, then you need to purchase this 3 gel memory foam mattress topper, it is amazing!! It took about a half hour for it to take full shape, it was fun watching it plump up. Now I cannot wait until we have an over night guest, no more sore back in the morning. 
I also tried the topper on my queen size bed, although it was still very comfortable I felt it was too soft, as my bed already has a mattress topper built into the mattress, I feel that it works better on a standard mattress. 
Super cooling, super comfortable and it comes with a removable cover, what more can you ask for! I highly recommend.