My experience thus far. I decided to buy seconds to give these socks a try at a lower price point. I purchased an 8 pack of medium boot socks. I received 13 medium, 2 large, and one extra large. Turns out this error was fortuitous as these socks run a little smaller than I expected. My foot is about an 8.5 but very wide with high arches. So this makes sizing guess work at best. The large size fit my foot perfectly. When I emailed customer service regarding the error I asked if I could exchange all of the medium socks and the xl sock for 7 pairs of large socks. They shipped out those replacements immediately and provided a return shipping label in the bag with the new socks. This is fantastic customer service, the person helping me was curteous and quick to oblige. I have only worn the socks a few times and while I really like them. I can't yet speak to how well they hold up as they are very new. I will say the smaller socks seemed to deform and sag quite bit. They didn't really fit correctly so I think that might have been the problem with those. Every company makes errors, how well they correct those errors is what actually matters. Overall this was a positive experience and I have what feels like an excellent product.