This has been the best purchase I have made all year. I had the feathertop and I hated the sink hole that was always there. After doing some research, reading plenty of reviews I decided to try the memory foam, but finding one at a reasonable price had been hard. I wanted a 2 inch, but, to many reviews didn't recommend it, so I was looking for the 4 inch, but, when I saw this one and read the reviews I was sold. After ordering it, I had it on my bed within the week, it had a slight odor, which was gone by that eveining and it was an awesome night. I have had such a peaceful rest, since I bought it.Wonderful product and price.