Believe it or not, I have used these since last October. I actually do custom ski boot fitting, so I also sold them all winter long as well. They definitely are worth the investment, and can also be used in many applications. I also use them in my snowboard boots, hiking boots, and many golfers use them as well. The only issue that I have seen is that they do not fit in some shoes(cycling), but I would without a doubt recommend them!

keep me posted as to how yu like tem over time...