I like A2 steel. It has performed exceptionally well for me on my CRK knive though I hear it performs poorly on knives from other makers due to the use of higher RC. I dont know if thats true or not. Just what I have read. I can say from first hand experience that the 55-57 RC A2 on my CRK knives is great. Holds a good edge and is a breeze to sharpen even after getting it really dull.