I actually have one and I think what makes it effective at all is the stiff brushroll. Other than that, its loud, suction at the hose is weak, and i can hardly feel any air moving at the base when I place my foot in front of it. One of the biggest issues with the tandem air design that I have found is the air flow path, its very narrow and also has a lot of twists and turns in it. As for the hose, it is a small diameter stretch hose that completely robs the main suction motor from having any performance at all.
