We took the kids to Prospect Park yesterday for sledding in the snow. I slipped these on right before we entered the park. They slipped on quite easily, despite the fact that I was wearing gloves while putting them on. I was able to get traction in the snow that was phenomenal; it was such a dramatic difference from wearing boots alone. I am considering getting their crampons as well. One thing I'd like to mention is that walking on asphalt or concrete with these on is fairly uncomfortable, and I'll bet it contributes to early wear on the product. So, while walking in the neighborhood I had to seek out the patches of snow and avoid the plowed/shoveled paths. Regarding sizing, I have a size 9 W foot and the size medium microspikes fit perfectly. Also, I cannot comment on the durability of the product because I only used it once. But I unreservedly give this product 5 of 5 stars.