We had just got a brand new $$$ Kirby, other half swore that it was the best yada yada, I hated the stupid thing, we even had crazy arguments over that Kirby, piece of junk...Anyway, I decided to buy the Dyson and deal with the fallout..We vaccumed the entire house with the Kirby (all carpet with 3 dogs) used a brandnew bag and it was half full when we finished. Then I broke out the new dyson and re-vaccumed the house and it sucked up almost an enire canister of pet hair and dust, needless to say I proved my point.