I would like to submit a review of Kingsdown's customer service and warranty promise. I would never buy another product from them. Long story short: Their product failed (Hudson firm mattress, $1600) sagging after 3 years. They would not honour their warranty because the mattress was bought at Sears..(because Sears is out of business they can't confirm the purchase... ?????). Not only is their product inferior..... they demonstrated terrible business practice.