wrote...

I have had this mattress for slightly over a year and I have had to
send it back twice for repairs because it 'sags' after a few hours of
sleep and starts causing back pain,. I just spoke to the guy at the
local king koil factory where this a mattress was sent for repairs and
his suggestions was ' Maybe you have not bought as good a mattress as
you think you did'

I just splurged on a Tempurpedic (mainly because my wife insisted). We are both
very happy with it.