You won't fully understand just how amazing these little patch cables are until you use them as a replacement to the patch cables you took out of the jar at your local music shop. One word to describe it: discreet, and in every sense of the word. It's designed to just be a small anomaly on the side of your pedal that disappears, and reappears on the pedal next to it.
If you're confused, just look at it. It's flattened so you can place your pedals at intimate distances. Because of this, the black cable is short enough to just bend below out of sight.
In terms of sound and reliability, it's certainly not designed to be stretched, so I'd advise against doing so. Other than that, they retain the sound well enough. Fantastic product!