My aunt bought these, and then emailed all of us to tell us not to...she said it was fine grit sandpaper! I haven't seen them or tried them--but after trying everything almost everything else out there, I just deal with the shaving.
Have you checked out the newer electric shavers? Supposedly there are some "lady" friendly versions that are much better than the old-fashioned ones. I've used my husbands a couple times when I didn't have time to shave, and then realized that nobody really cared if my legs were silky smooth or not--so the lack of "perfectly" smooth legs wasn't a big deal.