Deckchair - I think they're fab! Pick up the dust so well and much more fun that using a normal duster (oh god, did I just imply that dusting is in any way fun ?. Apparently ostrich feathers have some kind of special static that keeps the dust clinging to it until you shake it off outside (am not a scientist as you can probably tell from this explanation so this may not be entirely why the dust clings so well).
Trinity - does the Flylady one drop feathers? I have a bright pink one from the farmers' market (the people who sell ostrich burgers also sell dusters and eggs - I have no idea who needs an egg the size of a rugby ball but love the fact that they clearly don't waste anything!) but it does have a habit of dropping very fine pink feathers (they look rather like very, very fine fluffy ribbons) that the hoover won't pick up so I have to pick them up by hand. I had considered ordering a Flylady one in the hope that it won't do this but obviously not much point if it has the same problem.