I bought their Ringle repro skewers twice ( pewter and black) . Very good cnc quality and anodising, and very reasonable price for the high quality offered. No shiping issues, etc. I have never had Ringle ones, but I doubt they could be any better, aart of being genuine and Usa made.
I would believe they are europe or american made if they claim it. I've worked with many related bicycle companies in Taiwan first, and China later, in the past, and if engineering is well done from your side, they manufacture very well and at good prices . 95% of modern bicycles are made there, so they canont do that bad! The problem s when they design , I don't know why but its design ability is still limited....
The skewers I tried ( twice) were/are very good. I tried a swiss Ringle repro skewers, and the anodised was very ugly and CNC was simpler!