i bought this topper in 2010 as my main mattress, it worked well for about 4-5 years and then more recently has started to let us "bottom out". Has held up well with a matress pad covering, but the foam is started to crack and yellow on the side we use. I paid $* more than what it is selling for now - so what a great deal these days. I just bought a 12inch foam mattress that will be replacing this one.