Customers praise the ceramic water sharpening stone for delivering exceptional razor sharpnessrazor sharpness, positive sentiment and restoring high-end blades to their factory edge. The synthetic materialmaterial, positive sentiment requires no soaking, making it ready for immediate use. Reviewers also appreciate its effective grinding effectgrinding effect, positive sentiment and quality medium gritmedium grit, positive sentiment for steel knives. Opinions on ease of useease of use, mixed sentiment are mixed, as the stone requires practice and a learning curve to master the proper technique.