The SOG Visionary's are very good knives. I have the larger II model, not the smaller one, but the blade steel's the same. I don't find it that difficult to sharpen, but then I like recurves, & overall the blade holds its edge VERY well. I can't say it's any better than my SOG Night Vision with ATS-34 (Discontinued, unfortunately, but with thicker SS liners & G-10 scales), but it's definitely better than any of SOG's AUS 8 knives.
Once the arc-lock breaks in, I've found them to be just as smooth as B/M's axis-lock.
Hope that helps.