We had a 20 year old Tempurpedic mattress that we thought was fine. As a breast cancer survivor, I take medication that causes mild aches and pains and stiffness (a very small price to pay for continued good health!). For years, I have gotten out of bed and walked across the bedroom like a 100 year old person. The very first morning with this new one, I was completely not stiff, not sore, and immediately moved comfortably. Who knew that my issues were related to the mattress? This one is marvelous.