Purchased a Kings Down (very expensive) mattress with a 15 year guarantee. The mattress began to sag after 8 years. After inspection it was determined that it was defective. When they came to remove the mattress, their dream team reinspected it with a microscope, went outside called into their company and determined that the mattress was soiled (which it was not as I always used a pad). They failed to guarantee their mattress. They offered me a replacement if I paid $400, supposedly their cost. I will never purchase another item from them and would strongly discourage anyone purchasing from them as well. By the way, they did the same exact scenario to a friend of mine, who threatened a law suit because she had a bad back. They replaced only the top mattress, after weeks of fighting with them. You draw your conclusions as to their customer service practices.