I won one of these knives and a trainer from this site's year end drawing.
I've since used it everyday while working in a warehouse. I use it every single day, as i dont carry a box cutter. I've put it through the ringer. Cardboard, plastic bands, prying heavy staples, stabbing in a workbench while i work something else for a moment...
It holds an edge, and i've had NO issue with screws loosening. It has been really durable. It's a tad large for my taste, the wave works but could be larger. Otherwise this knife is pretty awesome. Having a trainer is just the icing.
-Cory