I received this topper and immediatly put it on my bed. I had my first GREAT sleep in weeks. In fact, I was late for work the next day because I just could not get out of the bed! I did some research and found that you should get a name brand topper with a warranty, they DO NOT last forever. It should contain 4 pounds worth of material in one cubic foot in order to last the longest and feel the best. It should be at least 4 inches in height; you can buy more height but it's just overkill, expensive, and not necessary. The research also stated you should buy a good mattress without any topper whatsoever. Then buy a separate topper and save big $$$$! When I saw this Serta brand topper, it fit the criteria exactly. Not only that, but every size is the SAME PRICE! I bought a King size and cut it in half for my two twins! Perfect and I saved money! From now on, all my beds will have separate toppers and I will get each one of them from Overstock.com!!!