Worn for a couple weeks now, including showering.  My neck is not discolored or has any rashes. The finish still appears brilliant.  Yanked on a few times pretty good, held up to that.  Very comfortable, don't even notice it.  I like the smaller 4.6mm, I'm only 5'8" so I think its scaled just right in this design (however, that is just personal preference, go bigger to achieve that "bling.")