The pixel snap option should be the same code used by Unity UI, so it's moreso meant for non-pixel fonts or canvases rendering at the same resolution. If you're getting good results without it, then you don't need it! I will have a look at that soon though, but it does just use a standard application of Unity's internal pixel snap code...
Just make sure the "quality" is your pixel font's point size, the "size" is "quality / pixel scaling" (eg. 16 pixel font / 100 pixels in a unit = 0.16 size) and that the text is aligned to your grid. (eg 100 pixels in a unit = position should be a multiple of 0.01) and everything should be fine.