It's a bit shorter than I expected (not quite 5cm from the Z3 Compact's lanyard attachment).
On the picture the loop looks like quite smooth, but it actually has a ridge on it, and relatively sharp edges pretty much everywhere. Not necessarily painful or anything, but it's something I would have liked to know in advance.
After removing it from the device to (I decided I didn't want to attach it through the case), the cloth around the inner plastic wire already tore. It doesn't prevent it from functioning (I've had similar problems with other lanyards, which did their job for years after), and the rubber outer cover hides it from view, but it's not exactly nice to have happen so quickly after purchase.
A nice unlisted feature is that the shiny part of the ring can actually rotate independent of the black part of the ring.