Another $1700 for a very advanced feature? Do you really need it? Can you really tell its there?
I questions the value of KDSS beyond what is already in place on this excellent vehicle especially when I think that the ride is already phenomenal. I would never take this vehicle off-road anyway and on road it seems amazingly smooth. And lean in corners? Maybe if you drive like a lunatic you get excessive lean, I don't know as I don't see a problem here. So, maybe KDSS provides some small benefit that only a absolute perfectionist might notice. It would nice to see if one could detect it in a blind driving test. (You know what I mean!)
Anyway, KDSS is just one more thing that eventually could require maintenance.
Before this I drove a 1998 4Runner. Now, that was one stiff and unforgiving suspension. I think that we are starting to get to the point of diminishing returns once you get something that rides as nice as the GX470. I think we are all starting to become a bit obsessive, looking for the smallest of improvements. You start to wonder, will we ever be happy? You buy the SUV and your already starting to think about the next one.