I purchased a king size Restonic mattress set in March 2010. After only a few months it started to indent and sag on both sides so bad, you could see it through my bed spread. I paid over a $1000.00 for it, sent them a letter to registered the complaint, they sent me a form to fill out in Jan.2011. I sent it back and I still have heard nothing, and it's now April 2011. It is the worst mattress I have ever had. If I could I'd return it for another brand. My back and pocket book are both sore and sorry. read full review »