I’ve been using Koh for quite a few years now and have found that it actually does what they say it will. Apart from being eco-friendly, it is very economical. The diamond sponges are amazing. I accidentally left a pot of water on the stove and it burnt dry. I thought I would have to throw the pot away. I used the diamond sponge & it came back as good as new & didn’t take too much effort. Koh is the best cleaning product I have ever used and would (and do) highly recommend it.