Very much a worthwhile upgrade!
Note to buyers - when you first remove the chain from the packaging dont be alarmed - the wax is rather thick on the chain making it feel very stiff (so much so I thought it would = a slow chain). I removed some of the excess wax with a microfiber towel and once you log 20 miles or so - the chain is exactly what the good folks at Silca promised. If noise is energy - this chain is very efficient as it makes zero noise when you are pedaling. Further, it does not attract dirt. Wipe it down after your ride - no need to lube for 500 miles. I have about 250 miles and I think it is still getting better!