Very pleased with this product. Birkenstock wanted $25 to replace my heels. With a steak knife and a utility knife, I was able to remove the worn-down portion of my shoe, then used Shoe Goo to glue on the Goodyear Neolite Rubber Heels. I used a table leg as my vice overnight, then trimmed the excess material as needed the next day. Doesn't get any more economical than that! I've replaced several heels on my favorite sandals, too.