Good for smooth surfaces
These are great on chrome and smooth porcelain.  Unfortunately, they shred immediately  when used on anything with lime scale, and then you have bits of sponge going down the drain.  They are not well suited to my old house's many rough surfaces, and for that reason I probably won't buy them again.  It's too bad, because I like the fact that  they have no fragrance or chemicals involved.
Rating: 3 stars