I've slept on many mattresses in my life. This thing is amazing. I'm the average American male size - 5'9" 190lbs. With other top of the line memory foam mattresses they were comfortable however, I would sweat too much. With this mattress in the same room, I never wake up in a pool of sweat. In fact since purchasing this mattress, I hardly ever wake up in the middle of the night at all. I'm much more rested getting up every morning than I ever was prior. This is worth the premium over the competition, especially if you have a demanding job and must get up everyday ready to perform at the highest levels - YOU NEED THIS AND NOTHING LESS!