I am a reality show camera operator and that's why I got these. I tend to opt for more protective footwear because of the unpredictable nature of my work, but agility was key on this gig so I thought it would make sense to get the Vibram product. I can be on my feet for the entire day, running forward and backward and feel great at the end of the day because of these shoes. I've even tried wearing my old footwear for a day or two on the shoot and have felt pain in my back and legs from the conventional footwear. There was no break-in period for the shoes, but there was a break-in period for making adjustments to my stride, which ultimately strengthened my legs. Love 'em.