Replaced my entire drivetrain this weekend (everything was worn, chain skipping), what a difference! Smooth, quiet, fast, nice.... Didn't even get the notchieness I would ordinarily expect with a new chain. The funny thing is that I knew things were very worn and I chose to do this upgrade after riding a century a couple of weeks ago. Everything held up fine on the ride but it started skipping the following Monday, so I've been riding carefully, in my small ring, without standing or hammering. Other than that, legs were a little tight and the temp was a nice 58 degrees. Should be a warm ride home.