I have been using Five Fingers for about a year. I initially used them to help me rehab a muscle/nerve injury in my leg. I have found that after learning to run in them my legs and feet never hurt like they did when I ran in my "running" shoes. I used to get  Iliotibial Band Syndrome when I ran over 5 miles a day. I have yet to have IBS come back after I switched to the five fingers. You learn to slow down, cut your stride down and pay attention to where you are placing your feet.