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Review title: Very useful!
Product review: I am no expert in knife sharpening, but do read and research much - even this topic. I used this product to sharpen all my non-serrated kitchen knives. It is very easy to use, and quite effective.The three sides seem long enough for most kitchen knives and the oil is helpful on the two smoother rocks - but seems rather ineffective for the most coarse rock.Turning the rocks sides is simple and takes not extra time. My only complaint is this unit does not grip the surface it rests upon. This unit really needs some rubber feet or something to keep it from moving on your counter top.
