Best purchase I every made. while my knife doesnt cut a fine layer of tomato without touching it, it became as good as it was when I purchased. I recommend users to learn how to properly sharpen the knife. It took me about 30 minutes to sharpen a single knife to what it is today. The knife gets really sharp. Also, with use, the surface gets uneven. I recommend you draw a grid in pencil and then file using the grinder stone until the grids disappear. This ensures the surface remains flat during all use.
I like the fact that there are two different grits (can be seen as two colors). the black rubber feet stick to the kitchen granite top like glue. The 1000 does a pretty good job of getting a knife roughly there and the 4000 puts on a fine polish for razor a sharp edge. I would go the extra step of stropping the knife after the grinding operation for an extra sharp edge.
It will be tempting to raise the angle here to get to the edge quickly, that is not the way to go. Re-paint the edge/bevel if necessary and try again. You can flip the knife prior to burr formation and work on the opposite side. Repeatedly feel for the burr with your thumb by running it very gently down the blade and over the edge, if the burr is there it will be very obvious, you need to create the burr along the entire length of the blade. Once you have done that, (you have accomplished what most people will never try) but besides that, you have to do the same to the other side of the blade.
The stones from Shapton are probably the hardest of all Japanese sharpening stones. They will remain flat for a long time. They are therefore the best choice if you are looking for a relatively coarse stone that cuts quickly without having to be dressed repeatedly. The finer-grained stones also work very well. But Shapton stones do not provide the mirror finish you can achieve with softer stones.
I can personally verify that this will get your knives very sharp. I will spare you all the gory details, but the picture is of the instructions the ER sent me home with after stopping the bleeding and patching me up. I have to say, that’s not what I had in mind regarding “Thanksgiving tips”. So: not only will knives slide easily through spinach, but they will go through finger and fingernail like a hot knife through butter after being sharpened by this whetstone. Very clean, straight cut. Impressive, really. Just take it slow and don’t be a moron like me.
Made in the USA means a lot! It sharpens quickly, whether you need to remove a lot or just a "tune up" on the blade edges. Because it's manufactured flat, it is excellent for planer blades and chisels. The ability to sharpen dry or with only water creates less of a mess than other types of sharpening stones. The no-hassle guarantee is a definite plus, though I would be surprised if you ever needed it.