We purchased a Sterns and Foster King size mattress set when I retired. We were also moving at the time. Since we were moving, when the set was delivered we left it in the protective plastic a loaded it on the moving truck about a week after it was delivered. We started noticing a more than normal sag(our opinion)in the mattress after only one year. I tried to contact customer service online since we had moved more than 450 miles from the store where we had purchased the set. No luck. I tried calling and the computerized system several times but it kept asking me to push this number and that number until it just disconnected my call. Finally I e-mailed what ended up being a PR department or something. Anyway they forwarded my e-mail to someone that returned an e-mail stating I could start a warranty claim online. My problem with that was I needed a warranty tag from the mattress. I search both the mattress and box spring and found nothing. No warranty tag to be found. I reported the fact and since I have to tags for whatever reason I am instantly at a dead end with this company. I have no idea where the tag is or if was ever on the bed. I have the original receipt and delivery tags but no warranty tag so I guess I am stuck. Bottom line, we thought we were treating ourselves to a quality mattress set for our retirement and got one of the worst mattress and customer service deals ever! No one wanted to help all because of missing warranty tags.