I don't have a KISS, I have a PECK.
The retaining screw between the frame and the blade loosens, so there is a blade wobble.
You must tighten it again and again.
The blade comes out of the lock if you side tension it, worse if the blade is loose. You must not twist with the knife, it closes on you!
Chisel grind is very easy to sharpen.
I would not recomend the PECK.
There are many much better and safer knives out there