Instruct: Classify a given review as either positive or negative.
Query: Terrific product

After years of trying out manual sharpeners of various sorts, I finally gave in and picked up this product, based on the reviews here. I am very happy with it - it's easy to use and it put a terrifically sharp edge on my battle-worn Henckel's chef knife. It sharpened both the dull and the sharp knives in my set equally well. I repeat others' recommendations when I say take the time to read the instructions - they're not long and they're straightforward - for best results.One caveat - I own several Japanese knives, and I know the angle of this sharpener is not appropriate for them. Stick to conventional knives when using this product.