Purchased these for the great ice storm of 2012 here in the Seattle area and they did work well. Couple of things; The fit was good and tight on my size 12 boots. It took some manipulation to get them on just right, but once everything was aligned I can't see them coming off by themselves. 2) The cleats are located under the ball of your foot. This was akward for me to get used to for whatever reason. I would have liked the spikes located further forward for my particular taste. 3)These are outdoor only! Want to anger your spouse? Wear these indoors and watch the destruction of your floors and marriage begin. NOT for indoor AT ALL as they will ruin any hard surface you walk on. I would still recommend them as they function as they should in the ice and snow.