The best knife sets are backed by a long-term warranty, feature blades that will stay sharp, are comfortable in your hands, and come with the types of knives you will use most, including a good chef's knife. The Chicago Cutlery Insignia2 18-Piece Knife Block Set has all the knives you need and even comes with a built-in knife sharpener. Even the best knives will dull over time, and it's important to keep them sharp for your safety.