I have one of Dans kydex sheaths and really like it. It is lighter than the wood one, so better for backpacking or if you have not much space and want to haul it.
I also have one of Terry Sisco's Quickdraws which is beautiful
HOWEVER, for me hiking in the woods and trail clearing, nothing beats the standard sheath.
That is because I'm walking along taking the khuk out on occasion and whacking brush.
The khuk will never fall out of the kydex, that 's good for security but the fact that it DOES hold so tightly and that it sets closer to the body than the standard sheath with frog makes me have to do more work to get the khuk out and back in the sheath. I can draw a khuk faster and put it back faster out of the standard sheath than they kydex or the quickdraw.
Not knocking Dan's design. I love mine. I'm just trying to hilight the difft aspects of the standard versus quick draw/kydex design.