Mr. Keeler signed up to VL once and started shouting the odd's about his bagless Kirby unit, making out like it was the greatest invention since...well, since the vacuum cleaner!
He was completely unprepared to deal with any kind of criticism or to be challenged on his product. When he was, he became quite defensive and, at times, nasty. He couldn't offer any information to defend his product when he was questioned about it, refused to acknowledge anyone who disgreed with him that it was the most amazing invention ever (in reality, it's not really an invention. It's just a TTI bagless unti mounted on the end of a Kirby) and fobbed all of those who did challenge him as idiots.
Quite frankly, I'd have had more respect for the man if he'd put his hands up and said "yes, it has design flaws, it's not perfect but it's designed to save on buying bags and that's what it does".
Like others have said, it's a nasty, clogging, high maintence filter in a plastic tube. It's not even cyclonic, all the dirt just sits in it and sticks to the filter, requiring constant maintenance.
Whilst it would be useless to actually use it in the home, it would make for a great demo tool.