Ditto. I have a set of KDW's with about 12,000 miles on them. Soooo grippy and it takes a lot of work to make them lose their grip on the road. Also, the seem to be pretty darn good on the tread life to date. I figure they're not quite 50% of the way through their tread life.
They are ridiculously loud, though - especially between about 40 and 55 mph. Almost loud enough to make polite conversation impossible inside the cabin at those speeds.
Would I get them again? I'll probably try some other brand, but all in all I would rate my experience quite satisfactory.