The USB to USB-C adapter offered by this seller is highly praised for its functionality and quality. Customers have found it to be the perfect solution for connecting their MacBook or other devices to a flash drive or computer for data transfer. It is described as an excellent product that works great, with some customers even stating that it is comparable to Apple products but at a much cheaper price. One customer mentioned that the adapter arrived without a box, but it was in brand new condition and worked perfectly. The only downside mentioned is that this cable cannot be used for charging a phone, which might disappoint those who were looking for a charging solution. Overall, the customer reviews suggest that this USB to USB-C adapter is a reliable and cost-effective choice for data transfer purposes.