I have had "generic tempur-pedic"s ever since I became disabled in 2009 with severe chronic pain disorders. Started out with the mattress toppers that kept on sliding off the bed, upgraded to a memory foam mattress in 2010 and still have them & many more years of use left in them! My son & guests will be sleeping in comfort on those! My new master bedroom however, a queen sized bed looked so small, so I upgraded to a king size. I have over a dozen memory foam pillows and MF body pillows too, but only in this last year I came across the cooling gel MF pillows, and wow do they really work! So for this new king size mattress, I bought it with the cooling gel, and I am staying cool in the desert valley heat! That is the only thing about memory foam mattresses, if you lay in one position too long, the mattress doea tend to heat up and absorb your own body heat. But now with this mattress having the cooling gel, on days that I am bedridden, I am in as much comfort as I can possibly be, without adding my chronic pain disabilities into the mix. And don't need to hike up the AC to be cooler too!