DH and I were gifted an 'used once' mattress last year. We are both tall and heavy. Both have bad backs and I have RA. We both wake up crippled and find it difficult to get out of bed. I want to replace this mattress with a pocket sprung type (which we had prior to this). Husband reluctantly agrees. I hate waste as this tempur mattress cost £3000+. Is it just us who find this product uncomfortable?