In my case, it's not "shelf life" per se but performance characteristics that I'm after. I guess I did mention durability so your comments are germane but the highest priority is that the electrical performance characteristics are spot on (5V is really 5V for example), the components are strong (can handle 20V on the VIN pin), etc. I figured there would be a 3rd party that had simply replaced some of the BOM with better components and used better fabrication methods/materials.