A 10-year guarantee is a long one. Bear in mind that the average mattress has a lifespan of around 7 years before being replaced and you can soon realise why many suppliers do not offer this length of guarantee. When they do, however, like in this instance, you can be assured of a mattress of good quality because otherwise the retailer and supplier would lose money. As such, buy with confidence, if anything does go wrong, you'll be looked after