we purchased a perfect serta mattress in September 07, from day one it had a bulge in the middle, thought it would go away, did not. we called sears co. where we purchased it, they gave us a phone number to call Serta, called the number they said we had the wrong number to call in complaints, did not give us another number to call. since we would be away for a few months we decided to wait until we returned and try again, we are very displeased with the product, our friends probably will not be buying this product, we wanted a service rep to come out a look at it and possibly replace it, no luck. I am a business woman and I have a motto, you might have heard of it. THE CUSTOMER IS ALWAYS RIGHT. YOU MIGHT TRY PRACTISING THAT.