I've worn these for two winters and walked over a lot of ice in them, and they work very well. They never slipped, and I never had a problem with rust or broken rubber either. I will say, though, that they narrow the contact your shoe has with the ground, and it's easy for your foot to twist left or right. If you're not careful, you'll twist your ankle badly. This is a great product, but it doesn't mean you can just waltz around in these things. You still need to be cautious.