You can get excellent results using only the Sharpmaker (I say that even though I´ve never used one), you can also get them using only a simple hone or using only sandpaper, it has to do with technique, the Sharpmaker makes it easier to keep the angle and the rods are good material and proper grit.
You shouldn´t strop until after you´ve done a good job sharpening, you don´t really have to strop, but if you don´t you are missing something, you don´t need a leather strop, try some cardboard or folded newspaper.