Yes, I too don't feel the bagless conversion is for me, but I do merit Mr. Keeler for coming up with the concept. IMHO, if you have to have a bagless, bagless cyclonic is the way to go. Nobody ever bothers replacing the filters in say, A Dirt Devil, because the whole premise behind a bagless is to avoid the expense of replacing bags. At $30. or $40. bucks a pop, the filter can cost almost as much as the machine. I have a Dyson DC15 The Ball Animal that was owned by pet owners, and even after washing out the cyclone assemblies and replacing the filters, I will never be able to get the smell of carpet fresh out of it. I would love to see Mr. Keelers self propelled kit - could it be used on say, an older 500 series Kirby? On a Bison, it would be cool to see as well. Finding a Bison (any Bison) today is pretty rare. I'm sure it would have been more of a commercial success had Bison been around longer....