I have the latest version of the Wicked Edge and like it a lot. The clamp holds any knife, large or small, full flat grind or otherwise, absolutely solid. Everything is 100% repeatable, as long as you take a couple notes when you first sharpen a knife. The alternating strokes have eliminated burr/wire edge issues for me. My favorite parts are the leather strops, which I'm using with 10/3.5 micron diamond paste. Since the angle is locked in, there are no worries about whether to lay the knife flat or raise it up, how much pressure to apply, etc. The mirror finish may not be as deep as knifenut gets, but it works for me.
Cons:
1. Expensive.
2. Won't do really small angles like you have on a thin Japanese chef knife. I mounted a 7" Kikuichi Santoku to check it out, and it wasn't even close (when you move the WE stones all the way in, they hit the clamp before they hit the knife). I use water stones to maintain this knife, so that isn't a huge issue. Just wanted to mention everything.