I have two Dysons. Love both. The big one we got when we had a very hairy German Shepherd. Worked great for his hair. Then he went to doggie heaven and I got the Cordless Dyson Slim which works great for our needs now. I can do the whole house and more on a charge, and no cord to fool with. I had several before this, including an Oreck and the repair man explained that the reason the Dyson is so light is because it has a small motor, plus all the dirt had to go through the motor. And with that big bag, it got heavy pretty fast. When it worked. With the heavy duty hair, it didn't work for us. Nor did the Sharp, and something else I can't remember.