Underrated comment. Even a cheap knife sharpened with a cheap sharpener every once in a while will do better than an expensive one not sharpened for months at a time. I wouldn't necessarily waste time on advanced sharpening though - it's not something you're going to do regularly, unless you're really into knives. I have a set of sharpening stones I used exactly once. The result was great, but it took like half an hour to sharpen a single blade - no one has that kind of time. A cheap Accusharp sharpener does a good enough job that I can slice homegrown tomatoes without any issues. And it takes less than a minute to sharpen a knife with it.