I bought the twin size mattress for my friend to go with an adjustable bed frame. I was very reluctant to buy it only because there were no previous reviews. However, I compared the description to other mattresses and chose this one because of the construction/layers of the mattress with no fiberglass in it. I thought if it was too firm,a topper could be added but there's nothing that can be done if you sink to the bottom. Also, the price range was acceptable. It arrived on time and was undamaged. The bottom line is that my friend loves it and helps her to have a good sleep. She thought it was thicker than my 10 inch mattress but I told her that hers was the same, only a bit firmer. She's very happy with it so I am happy too!