Good at first

It felt fine at first but after year three I felt hunched lying in bed on my back. Even on my side, my spine sags down and stretches on the lower side. I'm 171 pounds 5'6. And fairly active. We're on year five and I've been jamming pillows under my back to correct the arch. It is a one sided, sewed on pillow top. So you can't replace the topper when it gets worn and you can't flip it to let it rest--only rotate it which doesn't help much. It also sleeps hot. I get up about halfway through the night to let it cool, or else I roll frequently in the bed like a rotisserie chicken. And we keep it cold at about 60* in the bedroom at night.