My Miele is fantastic; it cleans impecably and runs quietly. I got ticked at paying $3 for each bag, so we ripped out the carpet and got a Dyson Slim which can get about halfway through our 1000 sq ft, dust and pet filled paradise before needing a shake to empty it.

I am doubly blessed in the vacuum dept.
Alas (or fortunately) there is so much stuff here that it is sometimes difficult to get to the floor.