(Miele S6 Contour [the red one]; Hoover Celebrity [the saucer]; four Connies [Model 446, Model 858 [two variants] and the all-white finish Model S3341])
I have a few myself.. I like them except that they tend to blow all the dog hair on the floor up into the air before you have a chance to vacuum it up. Now if I didn't have the dog it would be a different story.
The powerful air flow exhaust from the motor tends to blow the dust all around the house so that you can either vacuum it (succion) or send it all in the air!
One interesting fact also is the motor of the Connie was, more or less, the same motor which came to equip the small twin tub washing machines (minus very slight differences, the same Constellation vac motor for the spinner on those machines).
Here's a pic of one of my Connies (858) with lid lifted and motor taken apart :
The unfortunate thing about those "new" Connies is that the hose is too short and tight so the canister keeps bumping into your feet.. Otherwise they're quite nice.