Good at fighting tough stains!
I really like these pumice cleaning stones. They are great for getting off even the hardest buildup. I also really like that it replaces using chemicals. However, I only give this 4 stars because I feel they are overpriced and when they are new I find the corners make it a bit difficult to clean. I find it is much easier and faster once you have used it enough to make it a more rounded shape. They do seem like will last a few months each and make it a quick chore so I would definitely recommend.
Rating: 4 stars