I rated this stone 4 stars. First of all i like the fact it had 2 grits on both sides. It sharpened to a mirror like finish. However waterstone tend to wear very easily, and the thickness of each grits is only 1/2 inch. The overall stone was 1 in so each side has 1/2 inch of the stone. The waterstone wore out very quick resulting in my lapping my stone every 3-4 chisel or plane irons.