Yes, I've used them and was pleased how they got marks off the walls that I had been unable to remove with all other attempts.

I will say that they are *used up* rather quickly and I don't believe they are economical for use as a regular house
cleaning product. I never thought of using them in the bathroom. One thing I have tried for scum that doesn't want to come off with the regular cleaning products is one of the rectangular mesh pads that you would use for cleaning dishes. I forget the name of them.