I have a couple of questions about the durability guarenteed shoes and would really appreciate anybody who can answer my questions help. For shoes with the durability guarenteed, How many times can I return my shoes as long as I wear through the shoe like the company specifies? Also, do I have to ship the shoes back to the manufactorer? Do I have to pay for return shipping? What is the general turn around time, in which i request a replacement? Help would be much appreciated!