That cheap mattress topper from Argos lasted exactly three weeks before it turned into a lumpy pancake — spent forty quid on it and woke up every morning feeling like I'd been folding laundry with my spine. Swapped it for a proper memory foam one from a mate's cousin who works at a bed factory in Luton, cost a bit more but my back hasn't complained once in six months. Sometimes the extra hundred quid actually saves you money, who knew.