20k miles with almost half the tread left eh. That sounds very promising.
My new KDW's have about 15k on them and are at about 65% They held up much better the first 10k then my original set. The last 5k have been very rough on them for some reason though.

There have been two others here that have strongly recommend the Falkiens to me lately even. (One an autocross regular that lives by them)
Sounds like it's moving to the top of the list when I need some new tires. I know the prices are very reasonable too.