Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inferior Product

I was looking for a sharpener specifically for Japanese knives (I have 5 Shun knives). I could not believe how horrible this sharpener is. I really thought it might have damaged my knives. It is unbelievably course and it chatters very badly while sharpening. Do not even consider this product. Back to the waterstones for me!!