Bought these mostly to wear while walking our big, quick-paced, powerful dog on the icy roads.  They work really well!  Our footing is sure and secure and we don't worry about slipping anymore!  These are somewhat easy to put on; they do require a few firm tugs, but even with arthritis, we are able to manage this.  (Eventually, we just used our old pair of boots for these and left them on.  It was quicker and easier each day.)  They are fairly comfortable to wear; you know they are on your shoes, but we can still walk comfortably and pretty quick-paced.  They are lighter than most ice cleats are on your shoes.  They stay securely on your feet while walking.  As for sizing, the sizes stated fit most shoes and slimmer boots, but if you wear bulkier boots, such as Sorels or Kamiks (or are in the upper limit of the size range), you will need/be more comfortable in the next larger size.  These seem very well-made; as for durability, we walk several miles per day and after about a week, we've noticed considerable wear on the diamond spikes, but, so far, they still work.  We don't think they will last more than a winter, if that, but even so, we have bought another pair and can't imagine walking on the slippery snow and ice without them.  Good product; best we have found/used so far.  Would like to see more durable spikes, but will definitely buy again!  UPDATE:  Well, I have to lower my rating a bit, from 4 to 3 stars.  Depending on road conditions, such as more or less bare spots versus ice/snow coverage, a pair of these lasted about 3-5 weeks, on average.  We did not always wear them daily, especially later in the winter.  One would break, then the other soon after.  We were able to fix many of them to extend their usefulness by piecing the good parts together.  It was always the wire holding the beads that broke, never the rubber strap.  One other thing to note was that the rubber strap size would vary a bit from pair to pair, so when we bought a new pair, they did not always fit the same.  This wasn't a big deal, but was mildly annoying, as it felt different, as though we had the "wrong" size.  We went through 6 pair collectively and just made it through the winter.  More expensive than we had planned, but better than getting hurt.  Still a better product than anything else we've tried, but will keep looking for something cheaper/better!