I was gonna get one separately (I bought the EPkit1 and purchased my own stones)... I chose to just use my Extra Fine Sharpmaker stones as a freestanding hone instead, mainly because it has a higher grit than the Edgepro's and also just to save myself from one more gadget that does the same thing. Of course, the Edgepro's has a more desirable length (in fact, I was looking at a longer version) but I really just hone my pocket knives this way so I'm alright.
So I could hone directly on the SM, or I can freestand the stones (drawing the blade horizontal to straighten the edge, etc.). If you dont have a SM, you could buy one XF stone for around 15 bucks. Just a suggestion, I'm sure the EP hone works well also. I'm no sharpening pro, just offering my experience, I don't need people to quote me here on this subforum.