After sleeping on a tempur pedic mattress for the last 4 years I now have sciatica and chronic shoulder pain. The mattress has had a hole in the middle for more than 2 years.
You can't see the hole but if you apply any body pressure you can feel it is much much softer there, just like a broken sagging conventional mattress. Therefore, my spine is misaligned. It is excruciating to even turn in. My shoulders ache because it is too stiff where my shoulders lie.
It seems heat and weight break the material down. I awaken every morning in pain that takes a long time to go away.
Review about: Tempurpedic Mattress.