I have ordered from 6pm several times and have always been satisfied with their products and services. However, I recently had the benefit of working with them on a particularly disastrous case and they came through with flying colors.
I was attempting to return several pairs of shoes, which FedEx was supposed to pick up from my doorstep. They wouldn't tell me when they were coming, so I just had to leave the box on the stoop in the middle of the city.
Unfortunately, the box was stolen before FedEx ever came. 6pm managed to refund me the entire value of all the stolen shoes with no questions asked. FedEx was not nearly as helpful, even though it was more their fault than anyone else.