I love theses sponges. I can use them to get stuck on foods off of my cast iron pans and pans with a nonstick surface and don't have to worry about scratching them. I would definitely recommend these.
Works wonders on hard to get food particles without all the efforts that other products require. Really cuts my clean up time down without having to soak things overnight. Just the right product for the jobs that need a touch of hard while still being non scratch. I keep at least 6 in the house at all times, kitchen, bathroom, utility room, etc. Wouldn't be without them.
I found these sponges the best. With the teflon pans I have sometimes you need a little muscle to get the food off, but too much muscle, too many scratches. With these sponges they are the muscle, and you have a great clean pan, with no scratches, I love them!!!