Not a 10 yr warranty

I feel this mattress has been declining over the years since we purchased it. After the 6th year, I have had it with the quality. It's a king size mattress and it slopes on either side, tremendously. I called the company about this and its warranty. They responded that the warranty covers 5 yrs, no questions asked, but on the 6th year, you have to pay $125 per year from your purchase if you wanted to replaced it. So for $750, plus delivery options, we could receive a new one. We paid about 1,200. When we purchased the mattress, we understood there was a 10 year warranty. There is, but you need to read the fine print. Would not purchase this mattress again, not even for $750...nor deal with this company. I recommend reading the fine print on the warranty and/or looking else where.