I hate my vacuum cleaner. Yes, it was highly rated by a certain consumer magazine. Yes, the suction is excellent and it is quite good at removing dirt and cat hair. It is "self propelled" if used on carpets. But I don't have carpets. I have hardwood floors and the occasional area rug. The vacuum is big, and bulky, and weighs a metric ton. It gets an "F" for ease of use. The attachments don't stay attached. It is difficult to maneuver. I can barely carry it up and down the stairs. My use of it never fails to elicit a flurry of obscenities that would make the saltiest of sailors blush. I growl and grumble and scowl. I hit stuff in frustration. I grit my teeth and roll my eyes. I dread having to use it, because it always pisses me off and wears me out. Which is why I let the floors get so dirty before I take action. I HATE vacuuming. Hate it, hate it, hate it.
If they ever do invent that self-cleaning house, I am all over it.