D2 is known as a highly wear resistant steel. It's very hard, not that tough and not too impact resistant. A difficult steel to work and heat treat so not too popular with the more traditional knifemakers.

D2 can make a good blade when heat treated properly. For some reason though it doesn't seem to be able to take a very fine edge and cannot be highly polished (you get a weird orange peel effect, hard to explain until you've tried grinding D2). Can be real pain to sharpen on natural or softer artificial stones.