With all the hype about this stuff I expected something akin to Lunesta or Ambien without actually taking drugs. However, it's more along the lines of the wild west elixir sold by hucksters. It's nothing more than foam. Firmer that plain old foam rubber but still just foam nonetheless. Like all foam it gives the most in the places where one's center of gravity is the densest. I'm 6'1" and 175 so my weight and distribution bear little on the lack of support. Further, I ordered the 4 density foam, one step below the densest. I suspect that if one ordered a one inch thick version of the densest and used it as a mattress topper like a pillow top mattress topper, it might be OK. But I ordered the 4" and all it did was give more depth to sink. Just get a good mattress instead.