We chose these ones, as they looked the most obviously sensible, in conjunction with the EU rating. They arrived very quickly, which was good, as it's already sleet, hail and snow out there.
They slip and off your shoe very easily, just like pushing a large rubber band down and over the heel. Slightly tricky first time, but not difficult. The metal studs are much deeper and sharper than they look on the photo. No walking across linoleum in them.
It's a bit odd at first, like walking on football studs. But the positioning under the ball of the foot, and the heel, clearly works. I've just used them as I snow shovelled clear our drive and steps. With the ice and snow in a sludge around me. I felt so secure, I kept thinking "I mustn't need these ice grips!"
I'm truly no longer worried about breaking a leg, and they are very light and easily stuffed in a pocket when you get to the shops. Cannot recommend them more highly!