Its great using it for my little one. It does smooth out after i clip his nails. I was using my own nail filer but these are made by rigde metal lines to file instead of the sand kind of material for human filers. it does help and it doesnt seem to bother my pup.

Pros: Smooths em' out

Cons: ehh

We had one of these and while it did a fairly good job my wife thought that it was a little awkward to use on a small dog. We ended up giving it to some friends with a black lab and they like it. As for us - my wife uses an emory board and it works.

Pros: Does a pretty good job

Cons: A little large for a small dog