Not sure why, but neither of us could get comfortable on this bed. Think to firm, yet the sides gave too much. We tried on the floor, and on the old box springs and nothing worked. I have never had back problems till I slept on this bed. This bed is simply not for us.
We've had the bed for about 3 weeks now and couldn't be happier. Best bed we've ever had. First one was shipped to us with a minor defect, customer service had a replacement out to us in a week, can't complain and won't let the defect sour this review.