Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great...then gone fast!

Upon receiving this product, I immediately and easily sharpened all My Henckel knives and old Chicago Cuttlery knives. The process was quick and easy and the edge it produced seemed quite good.However, after that first session, the device seemed to be not working as well as at first. Repeated trips through the sharpener did nothing and possibly appeared to be dulling my knives instead. Close inspection revealed that the diamond dust was gone in critical areas.What a disappointing performance for something that has received such rave reviews from so many ...and has not lasted beyond that first encounter.Now I am in search of another sharpener, possibly the AccuSharp as highly rated by Cooks.AccuSharp 001 Knife Sharpener