I bought the first pair of these in 2007 and they lasted years. I am on my third pair and would never wear anything else. I am a nurse, they help with long days and lots walking. I bought them because my back hurt a lot, these were recommended to help with back issues. I notice the difference in my back when I don't wear them I can definatly feel my back hurt much more, plus my knees and calfs ache when I use other shoes.
In my everyday life If I have to walk long distances I always use them, they help me walk longer and further