Dyson really got the bagless vacuums to become the dominant vacuum in the USA. I think while it looks cool and relieving to see lots of stuff whirl in a transparent tornado chamber, it is far inferior to actually having a bag. You then have to dump out a dusty dirt container somewhere (hopefully not inside) and clean and sometimes replace an expensive filter. Vacuum bags are pretty cheap, and biodegradable, and much cleaner to replace. It holds a lot more too before affecting suction resulting in less empties.