For years I had been anticipating getting a tempurpedic mattress and sleeping within blissful comfort. After getting one I was so very disappointed. I would wake up with my entire backside slightly damp from sweating. It also truly was not very comfortable. I ended up sending it back within the 90 day guarantee. My husband and I then ordered a sleep number bed and it is ok but not wonderful. I hemmed and hawed about ordering this mattress topper for about a year and am so extremely glad that I did. It is amazingly comfortable and does not make me sweat. This addition to our bed is nearly as comfortable to sleep on as the best mattress I have ever owned. I am thrilled with my purchase of this product!