This is my first knife with a D2 blade. Wow! I knocked the edge of my PF939 blade and another knife blade (not too hard) on the corner of a piece of metal. The other blade was damaged and needed sharpening while my PF939 sustained no damage. I hit the PF939 a few more times each time successively harder and no damage to the edge of the blade! (I wouldn't recommend doing this if you are not ready to sharpen your blade, but...) Wow!
I purchased the DTW version which has black scales and an all black blade. I was disappointed that liners and screws were chrome colored and not also black. (I hadn't noticed in the pictures that this was so, but now I see.)
Overall a great knife. Precision crafted. Very easy and smooth deployment action. Firm open lock-up. Easy closing.
Just wow. Looking forward to more PF!