We had recently bought a new Lull mattress because our other mattress was old. Although it's a good firm mattress, it's a little TOO firm and we were still waking up with a noticeable amount of pain in our joints (my husband and I are 50). I was looking for a good, inexpensive mattress topper to see if it would help. It's night number three on our new mattress topper and we both definitely feel less pain when we get out of bed in the morning. It's not as thick as the picture indicates, but it is still a big improvement in our quality of sleep and our morning aches and pains. It fit our queen-size bed perfectly and the corner straps keep it very stationary.