They are so easy to set the combination, and the soft plastic cover on the outside does not scratch my expensive bikes. And they did wear out (along with the entire shoe), not come apart like the insole in my most recent pair of Keens. Change audio format to Dolby. This is enough for 2 fairly slow passes around any medium sized sedan making sure to get every nook and cranny including wheels and exhaust. Once again, these are pull on boots and they tend to run a little snug versus those having an inside zip. Its like walking on sandals made of concrete. A real life safer for our family with the small bathrooms. I ordered a nicer pair of hyperglides which are fantastic if you can find them, same goes for tigers, but they are a ways off in terms of shipping. 3D Sound, Heavy Base, etc. I wear a size 9 and bought these in an 8-9.