I was ready to give up walking because of pains in ALL the leg joints.  My prior walks were limited to 20 minutes and then I would be in pain all night.  Then I bought a pair of these for wearing to work and walking at work.  I took a 1 hour walk the 3rd day I had them and had no pain that day or that night.  I also have a pair of the glycerin from Brooks.  They work just as well but keep your feet cooler.  My only problem with the glycerin is that I'm not supposed to wear them to work because they are a "sport" shoe.  The Addiction at least look a little dressier.  Neither pair of shoes require a break-in period.