My mother gave me a knife set when I bought my first home almost 20 years ago, and though it came with a long sharpening rod that I used fairly regularly, I never sharpened them in any other way. So, it was not surprising that I was having trouble cutting tomatoes with the blades as they were. This knife sharpener was reasonably priced, small, and I liked the three step process. I sharpened all my knives (about 5) in less than 15 minutes, and they work great! They glide through tomatoes again!