My mum and Dad are 80 years old and their mattress was sagging by 5 inc within 3 days, they sent out someone to carry out the inspection who sad this is normal and would settle in a few weeks and to KEEP turning it. I then contact and paid for a private inspection and they found this £800 mattress to be faulty. It’s taken 3 months through resolve and me contacting the CO for them to get a full refund. I always say check out any companies refund policy before you buy anything, read theirs it’s a wonder anything can be returned! Stay well away to treat to OAP in the manner they did is in my book discussing.