If, like I do, you share your house with three cats you'll know that discareded fur builds up in carpets and soft furnishing and it can be hard to get rid of. The Electrolux aninal kit includes a useful attachment that allows you to get a bit more of a scrubbing action on te affected area, making it a little easier to get those last accumated bits of fluff and fur out. It's quite a compact device too and so will get into most nooks and crannies - in fact use it in preference the the standard attachment that came with our vacuum.
I'm not pretending that it's the complete answer to getting rid of this stuff, but it certainly helps.