I bought the LRG-XLRG size of these, as I wear size 9 ladies' boots in winter to allow for extra thick socks. They went on with ease, and adjusting the position was equally easy; they came off easily as well, which is important if (like me) you have poor ability to balance on one foot, and need to be able to slip them off quickly when going indoors. Having tried them on a light coating of ice and on black ice (quite by accident), the grip is pretty good, far better than I have had from even the best winter boots. I am not sure how they would perform on thicker ice, but I would guess that they would be fairly effective, given how they have done so far. They come with a set of spare studs, so I tested how hard they were to swap over; it couldn't have been simpler, and they seem to stay put when firmly pushed home. They lose one star because I found them just a little uncomfortable to walk in, especially on the ball of the foot. But I have arthritis in my feet and they are somewhat sensitive, so it might not affect other people as much. And the rubber is a bit thin; I imagine you might find them snapping after a lot of use or if your feet are a bit bigger, so be sure to get the right size. Apart from that, I found them an excellent solution to icy pavements.