It was a new concept for me. I am an Ebay trader so I was able to grasp the concept quickly, just apply it to shipping. The first time was the charm. Even though I had problems with my the merchandise, (non-delivery of goods,so small claims court here we come) I was able to complete the transaction. My shipper was patient and accomdating all the way through. There are good professional people working everyday! My experience is proof highly recommended**************