I just got my first WE system (Field & Sport Pro) a few days ago. I have not sharpened 4 knives, one that I re-profiled (25 dps to 19 dps). The first knife I sharpened was very dusty, but the 4th seemed less so. I am not seeing better results too. I am not sure if the diamond stones are breaking in or if my technique is getting better. I think it is both. I have yet to try and sharpen a knife that I care about yet. I am progressing my way through cheap knives that I don’t care about.