I have tried numerous other tracks and been left sorely disappointed. The others either break instantly or offer little grip on ice. These are about the best tracks you can buy but with that said, there is still some room for improvement. The biggest problem I (and my two buddies also own these) have is that the back straps are stitched together FAR TOO LOW. They stitching is so low that it makes it extremely difficult to reach the heal of the boot. Whomever designed these must have based the prototype on sneakers or Converse or some other small, lightweight shoe. The product picture clearly demonstrates these being used with a large boot, as most users do. The placement of the stitching doesn't make any sense. It's quite stupid. SOLUTION: sever the stitches and re-sew at an appropriate height. See photos. It's a pain to have to do this but now that mine are modified, I'm pretty happy about it.

NOTE TO MANUFACTURER: adjust the stitching to an appropriate height.  Put these on your snow boots. Any boots at all and you will see what I mean. Shocking that they sell like this.

In the attached pictures you can see a side-by-side comparison of the "before" (left boot) and "after" (right boot).  Also shown is a side-by-side with both tracks modified (one is slightly higher than the other as I am not a professional seamstress. My first attempt at using a sewing machine). Without this modification it is really difficult to get the strap around the heal.