Advice in the showroom seemed fine. Delivery was great. Bed sagged after a month or so. We're not particularly heavy and the salesperson knew I needed support for my back. I called up and then got told about the 'tolerance' that is 'normal'. I knew we hadn't reached the degree of sagging where they would accept that there was a fault so we opted for the exchange and paid £100 or so more for another bed. Exchange was fine. New bed sagged too. A few cm may not sound like much but it really doesn't support your back. I know that they won't accept that there is a problem until it gets extreme and I'm not willing to sacrifice my back for that. I've flipped the mattress to the 'non topper' side so it's rock hard and ridged at the edges but that is better than saggy for me. Feel we've wasted a lot of money.