The Hoover U5453-900 WindTunnel Supreme bagged upright vacuum has elicited mixed reviews from its customers. First, a word about the vacuum cleaner as it leaves the manufacturer's warehouse. This is one premium vacuum cleaner that can be fully accessorized. The Hoover WindTunnel supreme can be accessorized with a furniture nozzle, a crevice tool, a crevice wand, an extension wand, a hard floor brush, a dusting brush, a powered hand tool, an extra long hose, three different models of agitator belts, a power drive belt, a "y" allergen bag, a light bulb, a filter, and a secondary filter. Some complain of its noise; and that it's over advertised. One noted that this vacuum cleaner model is "noisier that Concorde taking-off, lacking only the sonic boom!" Customers note that Hoover's marketing department emphasizes the patented Wind Tunnel technology, an embedded dirt finder display (as one customer translates, "i.e. a red light and green light!), and an exclusive covered-up tool panel (as the customer quips, "to hold one brush attachment-whoopee!"). Furthermore, customers note that the Hoover Allergen system is not HEPA filtration. Others are delighted with their purchase. One notes, this vacuum "sucks so hard it could leave hickeys!" and goes on to enthuse that "after using this vacuum, my carpet looked like a different carpet and the room didn't smell like dogs." Customers are pleased that the vacuum cleaner is bagless, which means that they give up buying new bags for their vacuum cleaners. They love the visibility of the twin chamber system, that allows them to see how much dirt is being cleaned.