@engineer,
We have 2 Miele's and we all love the little things. They are light, they suck like a whirlpool , and they are so quiet the cats dont budge .
They are a bit pricey but we have a top model down stairs and a bottom line upstairs. They both perform the same. The top model has more bells and whistles thats all.
I like the way these things can keep the dust (<4 microns) down in the rooms. We used to have tv screens with dust attracting power, now it takes much longer to even get any dust on a big tv screen.
We sweep about 1 a week and we split the chore