All uprights, 4 years of picking them up curbside:
1. Bissell bagless (filthy, clogged)
2. Hoover Windtunnel (bagless mostly, filthy, clogged filters)
3. Eureka bagless (filthy, broken belt or worse)
That's definately the most common. I've brought home 3 Bissell's in one evening somedays (most...