My model 1, serial #3 had a flattened detent ball. Mike fixed that for me, and removed the "other" thumbstud at my request while he was at it.
I've carried it some. I _love_ the handle shape. I'm not nuts about the clip (too difficult to clip / unclip), but I believe it's _exactly_ the same one you'll find on the Kit Carson knives, so it can't be all bad.
I really like the blue G-10 of the handle, like the fit-and-finish, like the blade-length. I guess I just like it!
As I start to compare...
Fox folder - pretty close (cheap for a "custom", feels delicate)
Obenauf - undervalued (I guess because he's a new maker)
Sebenza - overvalued - nice, but not THAT nice
Mayo TnT - just right -- expensive, but worth it
Mike