Hello!
I use mine for all different types of knives:
(some different ones, mostly production)
The results I am getting now are really pleasant. This was not so much the case when I started using it. On top of what everyone said so far, also make sure you use the "correct" amount of pressure. This is a thing only experience with what works and what doesn't will tell you.
I did apply (way) too much pressure at first when I got my sharpmaker. This did not only result in fast removal of material, but in a (badly) chipped edge for some steels instead (I only remember Aogami, W5, D6 and ZDP189 now). The long, long, long, long rounds on the sharpmaker to get out the chips a) made me get the diamond rods and b) taught me how much pressure I really need...
Nowadays, I don't let my knives get really dull any more and often stop after using the brown standard coarse stones, because some steels hold that working edge better than the finer one in my experience.
Regards,
Alex
PS: whenever your sharpmaker is as dirty as mine was above, cleaning is overdue. I do it using a standard steel sponge and Cif (an abrasive kitchen cleaner) now. Of all the things I tried, this gives me the best results the fastest.