I have owned my Serta Cali-King, Vera Wang Beyond Exquisite Organic Cotton Mattress for 2 years. I am amazed that Serta is still in business with their HORRIBLE customer service. My husband is 170 lbs and I am 114 lbs... when he lays down the mattress sinks at least 4-5 inches and my side goes in 3 inches. There is a giant wedge in between us where the mattress raises up. We bought this mattress thru Sleep Train for over $4000 because "it will never sag because of this super duper paralay latex...blah...blah... blah" Called Sleep Train and they sent out an inspector who placed two large cardboard cirlces on top of the mattress, and he said my husband side is at least an inch deep without weight. The inspector said it was a large/deep hole and he would send in his findings. My side was around 3/8 inch sag. The problem with placing a toliet paper roll type cirlce on the bed is that IT DOES'T WEIGH ANYTHING! The minute you put any pressure on the mattress you fall in the deep sagging hole... Sleep Train and Serta both denied replacement of the mattress becuase the sag has to be at least 1 1/2 inch sag. The pillow top isn't going to sink another 1/2 inch without my husband suffocating in the mattress...Our backs are killing us and now we have to buy another mattress... Terrible product, terrible company, wish we could do something... DON"T BUY A SERTA!!!