We ordered the medium-firm mattress and it proved to be the right choice for both of us. Due to the new mattress, our quality of sleep has greatly improved and we now wake up without the old back aches and pains we suffered with our old mattress. We both have the support we need, we no longer have to fight to stay in bed when sleeping near the edges due to the high level of support in these areas provided by the new mattress. The mattress is just the right thickness and is the right fit for our bedframe. Very pleased with this product.