Have made several complaints to Bensons about a mattress which has developed 2 body-shaped troughs, with large dips at hip position. The FIRA technician declared that, despite the fact that the mattress has been well maintained, there is a problem - just not a manufacturing fault. Naturally, Bensons deny that there is a problem and have even suggested that we should stop using it to make it last longer! They have said that we can get second opinion, but they have to pre-approve them and won't accept a report from a competitor. We were encouraged to upgrade to a more expensive mattress by the sale advisor - it has turned out to be made of cheap materials (low-grade memory foam) and certainly wasn't made to last 7 years! Would never deal with Bensons again. Can't understand how the reviews on "trustpilot" are so favourable.