I started selling my own PCB and have been using Elecrow for about three years, since the early stage of the project. My contact, Lynn, has taken good care of me from the beginning, with kind support and proper follow-up when I still didn’t know much. I also received advice when there were problems in my BOM, and my later requests, such as adding serial numbers and attaching OLED displays afterward, were accommodated. They even fixed standoffs to hold the OLED displays in place. I’m very grateful for all of it. The board is already on sale, and I’m now planning version 2, which I also intend to order from Elecrow.