You might not remember Benson Leung, the Google engineer that tasked himself with examining USB Type-C cables. He's been diligently doing so for months, but he's calling his tests to a halt after one went horribly wrong. Leung bought a USB 3.1 Type-C SuperSpeed cable (it's since been removed) from Surjtech on Amazon, and proceeded to check it using his Chromebook Pixel 2 and a pair of USB power delivery analyzers.
Source: Benson Leung (Amazon review)