It is always difficult to buy an item without knowing, precisely, how it will suit. This mattress had excellent reviews, a manufacturers exchange guarantee, a specialist test and review organisations seal of approval and the benefit of John Lewis excellent customer service. We also thought that, even in a worst case scenario, the moderate price would in no way break the bank.
Any worries quickly evaporated - following a speedy delivery, excellent fit to our bed, short period for the mattress to "recover" its volume and shape, and excellent comfort.
If I wanted to be picky, I could find a couple of items. Not the most beautiful mattress (do you need to see it uncovered?). A few loose threads from manufacture (soon trimmed with sharp scissors). But - the best sleep for a long, long time and at a fraction of the anticipated outlay!