I use mine and so do the others I've given them, too. As long as you aren't using them for scrubbing cleanser like Barkeeper's Friend or Comet they seem to last a long time! I love them!
The cotton comes in many pretty colors which makes knitting them fun, but I have discovered that they do stain so I'll probably stick to "stain colors" like brown ombre or a variegated brown color.
Oh and don't bleach them...
