Naniwa Pocket Pro Stone PS-308, sharpening stone grit 800

The Naniwa Professional sharpening stone 800 grit is a small sharpening stone that is close to a medium sharpening stone in terms of grit size. Are your knives still sharp, but not cutting as well as they did before? Or do you use your knife very often, and you're looking for a sharpening stone to maintain your knife's sharpness? Then this 800 grit sharpening stone is ideal.