Finally used the Peticure on my dogs. It worked fairly well. It did smell a little bit and did get hot, so you could only use it for a while at a time. But it did work! My biggest complaint, the sand paper-like ring that actually files the nails can be replaced, and it kept falling so that it did no good.
Both dogs were ok with it, though neither liked it. Compared to normal nail clipping, I think this is slower, but it is easier to do more often. So, it will probably, in the long run, be the better way to go. Especially for me, since I don't like to clip their nails and always have to take them to the vets office to do it!