I run 20-30 miles/wk, and have a very different take on this than bialecki -- I find when to rotate my shoes really problematic. Explanation: I log every single workout and know exactly how many miles I run per week, but the issue is that I actively rotate between 2-3 pairs of shoes (one of my previous running coaches once told me that you should never run in the same pair of shoes back to back, and rotating has worked very well to help me avoid injury). In 2012, I ran around 1000 miles, but I honestly have very little idea what the distribution of the miles was between my shoes (keeping in mind that I might wear one pair for a 10 mile distance run, and another for a 3 mile track workout). Looking at the wear on the soles generally helps, but this method is crude at most.
Thus, for the runner who has one pair of shoes and logs their workouts, I agree that this device has little if no use. For someone like me, I would appreciate a solution where I could attach this to each pair and "set and forget it". A $15 or below price point is an attractive solution, especially if these devices have a long life (multi-year).
Thus, for the runner who has one pair of shoes and logs their workouts, I agree that this device has little if no use. For someone like me, I would appreciate a solution where I could attach this to each pair and "set and forget it". A $15 or below price point is an attractive solution, especially if these devices have a long life (multi-year).