I'm officially a Darksider. Picked up the tire yesterday, pulled the wheel last night, shop mounted it and I reinstalled it tonight. Only a 40 mile ride so far, first impressions...mixed. On pavement, at highway speeds, love it. Smoother and seems quieter than the bike tire, tracks fine. Twisties, a little different but still fine-takes a bit more effort to counterstear, but after a 40 miles I was comfortable with it. My county road is 3 miles of hardpacked dirt. A little different, more wander on ruts/uneven terrain. Worse than stock, but not bad. My driveway is more uneven...not good there. It's do-able but going to take some getting used to. Crowns/ruts sort of point the bike where they want to. My impression-prefer a bike tire....but for the price difference, I think this will be fine. Need to optimize tire pressure and get used to it.
The stock Metzeler 880 is $301 (Revzilla). Mine was dangerous at 6900 miles (cord showing-my bad, didn't realize how quickly they wore), safe life is ~6000. Lets say the Darkside last 30,000. That's 5x$300=$1500 worth of "stock" tires (alternatives do exist but are still spendy). Vs. ~$110 for the Darkside. For the price difference (not even counting mounting and balancing, let alone my time to pull the wheel), I'll learn to LOOOVVEEE the Darkside. Even without the price difference, I suspect I will anyway with a bit more time on it.