We purchased a Stearns and Foster "Tanya" king set, flat top, from Value City and had it delivered in December, 2012. Within two weeks, body indentations were apparent. I flipped the mattress end for end and hoped for an equalization of wear. Instead it just worsened over the next two months. It became difficult to move on the mattress at night due to sinking into the cavity. Value City sent a technician to measure the depression. The inch and a half and two inch "holes" qualified us for a trade in. We're going to try a Temperpedic memory foam bed and hope for more durability. We commend Value City for standing behind their products, but we do question what has happened to mattress quality. Our old mattress never sagged even after 23 years of use!