I put the KHE Half Link Hollow Pin on my bike on May 23rd 2007. Thats 287 days or 24796800 seconds. By now on the second bike, 4" smaller and still the first chain.
An eventful summer and a mild winter gave me, my bike and the chain a lot of time of riding. Due to missing pegs on my 24" bike all the grinds went on the drive train.
As a result the chain is not as shiny as it was when I put it on and there are 2 or 3 dents but it is still reliable and save getting the power to the back wheel.
Rumors are it should have snapped about 287 times and should be terribly unsteady on the sprocket but it seems like the laws of the forums do not ably to me. So no rattling or snapping for me, OK, once, but exactly at the link where i did a bad job putting the chain together.
Summing up, the chain is light, durable, a good looking half link and worth every penny.