I have just read a little about Kershaw's "metal injection" method using 440c steel ( http://www.knifeworks.com/index.asp?PageAction=VIEWPROD&ProdID=7444 ) and was wondering if anyone had any experience with this type of blade? How does it hold up compared to higher end metals like d2 or s30v? Is it difficult to sharpen it considering it has two bevels? It seems to be pricey, is it worth it?