I spend over $1200.oo for a new mattress and box spring. In less then 2 month I could feel the mattress sinking. I had the same bed for over 30 years. I never had any problems with the other matress on that bed I had brought a Setra. My co worker recently brought an another brand and had the same problem in 6 weeks. Now mattresses are only one side and can not be flip to the other side. They don't made mattress like they use to. It is the mattress and not the bed.