I don't have the one from the Flylady website, but I found the same thing a few months ago at a dollar store. I bought a couple of them. I don't like it at all for doing dishes. I tried various cleaning jobs with it, and it didn't work well. I brushed the cats with it, and they loved it...but it didn't remove much hair at all compared to our regular brush. It is good though for removing cat hair from furniture, bed spreads, etc.
I only paid $1 each, but I definitely would have been upset had I paid full price for it at Flylady. I've also seen these brushes at Petsmart before.