As Steven said it does take and keep a wicked edge. I've cut up many a box with mine and when it was not hair poppin' sharp I just stroped it and it was back. A deep hollow (but nearly flat, if you know what I mean??? possibly done on a larger grinding wheel?) and a blade stock of 3/32 means a very fine edge and not much metal going through media as most tactical styled blades. So, it cuts the cardboard like butter, leather as well, which is mostly what I have cut. The thinner build/construction and slender clip point mean that it is a pure cutter, and not a pocket prybar, so if you need that bring your Strider AR/SnG or Emersons. It is interesting to me that Tom Brown would pick a knife like this for his survival school/instructors, but he knows better than me! Would make a fine combo with a larger fixed blade (such as the "Tracker" by Beck or TOPS). And as we all know the best survival knife is "the one we have with us", this baby with the William Henry clip case is great in that regard. Sheeple friendly looks, and good in anything from jeans to suits.
Yes ZDP-189 is amazing stuff however I noticed that the 420 laminate is prone to sraches, no porblem for a user knife which this knife is meant to be. Currently in my EDC rotation, and looking forward to more cutting tests with it.
Thanks,
Scott