I purchased my Crown Jewel Coronet double mattress from David Jones delivered February 2018. Went back to the store regarding the lump that has developed despite utmost care as per instructions and have been told Sealy will need to inspect at a cost of $165 upfront, only returned if a fault is established (by Sealy) with no chance of a refund, just "fixed".

This turned out to be incorrect and my mattress was picked up and inspected - fault found and returned within a week for no cost. Good communication throughout.