I don't know what a pedi-paw sounds like, but my peticure arrived yesturday.
two of my dogs are groomed regularly. One was afraid of it, the other didn't care. I think it reminded Bailey of clippers, which he hates.
Max the westie, has never been to the groomers. He was afraid of the sound too, so I turned it on and gave him a treat. After a few repetitions, he would come running whenever I turned it on. Next I treated for letting me touch his paws with it, not the grinder, just a plastic part.
I'm not going to rush using it, and risk having a $30 paperweight.