The key to serving any kind of cheese is to maintain the flavor of the cheese. Slicing cheese and, by extension, the slicer that you choose to use can affect the flavor of the cheese. To maintain flavor, try to slice the cheese as evenly as possible. A cheese slicer, like the ones mentioned here, gives you the best chance of getting an even slice every time, something that can be impossible when using a kitchen knife. Slicers also give you uniformity in the slices, important for presentation and serving, important in any restaurant setting.