I'm a 25 year law enforcement veteran and work 12 hour shifts. The Protalus have been a lifesaver for me. I was using other higher end orthotics for about ten dollars less, but the difference in quality and support (both physical and customer) is readily apparent in this companies model. They last about 4-6 months with fairly heavy use. The first pair lasted about 3 1/2 months but I started wearing them almost every day. I have three pair of the grey ones (Gen I?) left but just ordered two more of their next gen models. Any company that puts customers first deserves support, especially a domestically based company. Keep up the great product development team Protalus. P.s. I just bought a pair for my Dentist wife who will be putting them in her work clogs. She's moderately high arched, but has been getting some plantar pain.