Good quality chain. I've been wearing it near daily for approx 2 months now (sleeping, showering, life... only taking off when working out for fear of my chest hair) and it has held up well. Clasp has not broken and stills looks like new. It's the ideal length for me as well; i'm able to wrangle it off over my head without undoing the clasp which is nice and a plus for me.

Update on 2/19/2013 - Now after 4 months, still going strong and looking like new. Again, showering/swimming/sleeping/etc.