$1900 mistake. Sags, painful to sleep on.
Bought this gorgeous mattress on sale (thank God I did not pay full price!) less than 2 years ago. It was wonderful the 1st year but I noticed it starting to sag. All the lovely pillowtop materials are gone in the middle - if I want to be comfortable I have to scooch to the far ends of the bed and risk falling off! I alternate sleeping at the head, then the foot of the bed, then at either side.
20 year warranty is a joke. They only honor the warranty if the sag is measurable (3 inches) when no one is IN the bed.
Review about: Serta Mattress.