I started carrying one about a year or so ago. Rounded off the edges and sharp spots on the pommel end. Then had it ceracoated a color much closer to my uniform shirt. It rides behind my magazine pouch. Given the rotation of the sheath on the loop and the angle of the grip, I'm able to roll the grip out and down to help hide it visually.
I much prefer the new sheaths with adjustable retention. Deployment is fairly straight forward but I work on reps as oft as I do draws from the duty holster - daily.
The new NCO model would be my choice now, based on cost and mods already done to it in comparison with the original models.