Cheap vacuums clog, lose suction, and die in three years. This actually works and lasts a decade.
Why Not Just Buy the Cheap One?
Cheap cordless vacuums like Tineco and Black+Decker clog within 6 months because their filters aren't real HEPA and their brush bars wrap with pet hair, losing 40% suction by year two, with batteries that can't hold a charge past 2.5 years. Dyson V15's laser detects dust you can't see, the brush bar auto-adapts to carpet type, and the motor runs at 100,000 RPM consistently because they spent the R&D to make it last—most vacuums lose suction; this one doesn't.
The Buy-Once Math
Budget vacuums need replacing every 3 years ($400 × 3 = $1200 over nine years) plus the degrading performance means you're vacuuming longer or accepting a dirtier home. V15 costs $750 and maintains 95% suction efficiency for a decade, meaning you buy once and don't compromise on clean—and that's before accounting for the two years you didn't waste fighting a dying machine.