Ya, definately should be a fly in everyone's box IMO.
The key is to get all the guard hares out, to get to the good dubbing. I find that you have only a little amount to play with right close to the bones that is good for dubbing (wrecked a few pairs of scissors in the process). I usually just take one foot and cut away the guard hairs and get the dubbing from it and keep the other for the wings/tails.
I made the mistake of using the top of the foot and trying to dub the guard hairs when I 1st used it, but finally found out what works best.