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I tried Arkansas back in the 70's so it has been a while. My only objection at that time was I thought they took a very long time to get results. Of course, at that time, I hadn't done much sharpening yet so it could have been just me.
I've got an old Smiths Arky stone buried somewhere in the bottom of a tool box. It was the stone I first tried to sharpen knives with. Like the others say, it was slow. It could be that I used too much oil on it, but it got clogged very quickly to the point it wouldn't do anything, and developed a nasty glaze. I didn't use it for long before I switched to sandpaper and then waterstones.
Generally, I didn't know what the hell I was doing back when I was using that stone. So my impression are colored by that, I'm sure. I ought to find it and clean it up and see what it will do now. I'm sure it's a lot more capable than I remember.