Cam2s, I have the same brown shag rug you do, and the Hoover Z 700 is one of the few uprights I can use on it... Kirbys and Eureka F and G style uprights work well too, but not much else does... I usually use the Sentria when I want to give it a deep clean or a straight suction for surface cleaning.... Royals almost do OK, but not nearly as well as the Kirbys... Kenmore Direct Drive works OK... Eureka Smart Vac, Sebo/Windsors and other Hoovers (like Platinum Lightweight Bagged, Self Propelled Windtunnel, Dial-a-matic, or Concept) do not work well at all... What have you found to work on yours?