There is no doubt that this topper has made all the difference to the comfort of our sofa bed. A couple of guests have confirmed this. The fit is excellent. My only complaint is that there is a strong smell from this topper which I'd hoped would fade with time. So far, a month on, it hasn't faded. Hopefully this will happen if exposed to the air for longer. I'm considering a fully enclosed mattress cover instead of the Quilted Mattress Protector cover that I bought at the same time as this purchase. That may help the problem. A pity as it spoils an otherwise very good purchase.