Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Greatest invention ever for preparing a grapefruit to eat

My wife and I rent a condo in Florida for 3 months every year. We enjoy fresh grapefruit and over the yearshave always prepared it with a plain paring knife. We found this Norpro Squirtless Grafefruit knife in thekitchen utensil drawer this year and started preparing grapefruit with it. I told my wife that this is the greatest invention for preparing the grapefruit I have ever seen. The knife is very easy to use and I now enjoypreparing the grapefruit. I went on line to Amazon.com and found the Norpro Knife and purchased it.Thanks Norpro!!Myron & Joanne