I use them and like them, but they're all I've ever used with my pc so I can't make any comparisons for you. I purchased a kit of them (2 of each grade and a backing plate) when I first got my pc and haven't had to replace them yet. Although when I do, I'll probably switch to the edge system if I stick with the pc...still toying with the idea of getting a flex, in which case I'd probably stick with the SFX pads since I have no complaints and they're holding up extremely well.