Hello. I've been following these posts and enjoying everyone's pics, experiences, info, etc.. I thought I'd contribute. I have a Kou in ZDP. I didn't carry/use it much, but then I loaned it to a friend for him to use and to see what effects there would be from his use. This was some time ago.
Based on his use and how well it held up, I decided to use it as my EDC folder and have carried/used it since. When he returned it there were a couple of "nicks" in the edge I could feel with my finger nail, but couldn't see.
I don't use it for anything that would be considered abuse. During this time, I've used very fine grit wet/dry sandpaper and a strop w/diamond paste. I haven't really been too concerned with scratches in the mirror finish (there are very light/fine scratches in the mirror finish when light is shined on it at certain angles).
Current condition is the blade edge is as sharp or sharper than when I received it new. No perceptible nicks. Pops hairs and very smoothly cuts phone book paper. No "blade play". Also, the handle finish has held up very, very well (would have to really look it over to see a couple of dings).
I'm very impressed with this knife and would definitely recommend it. I have quite a few "high end" knives and the last thing I "need" is another knife. However, I'm pretty sure I'll be purchasing another Rockstead folder.
Last comment, I don't want to imply that everyone would have the same positive ownership/use experience. But, I definitely think Rockstead compares well with other "high end" folders. Thank you and best regards.