I have it. I love it. Bought it when I bought my house. It still amazes me how much dog hair it sucks up. I find it funny on commercials for other vacuums how they always compare it to the Dyson. Kind of tells you something about it....
I thought all vacuums were the same until my wife's roommate showed me her Kirby. For that one to be nearly 12 years old at the time and was still picking up shedding dog hair from 2 German Shepherds and a Yellow Lab impressed me enough to get one for my wife and I when the roommate moved out.
No longer do we need to rent a carpet shampooer or hire carpet cleaners to come in and steam clean the carpets, when the Kirby can do that as well as vacuum.
We had an old Dyson with a motorhead, which we loved.
When it finally died we bought a new Dyson with a "Turbo" head (not the motorhead) and it was the worst vacuum we've owned. Overpriced and useless. Sold it on eBay after a year of swearing at it.
Now we have a Hoover with a powerhead - as good (if not better) than our old Dyson.