That was my post and I repeat, it's junk. The quick release mechanism is useless for anything except the included plate. It won't accept any of my Wimberley lens or body plates. For the same money they're asking for that stupid clamp and plate, you can buy a Sirui G-20 ballhead and be way, way better off.
See that light metal part on the near side of the clamp (in the photo a few posts up)? That piece is spring loaded and sinks down into the clamp when you attach the included plate. The flared bottom of the included plate is thin enough to let the spring loaded piece snap back up into place. The flared parts of any other A-S plates (at least the ones I own) are too thick to allow that piece to snap back up. And the opposite side *barely* grabs any of the flared area of the Wimberley plates. To make it worse, the spring loaded piece kept getting stuck in the down position, so I had to use a small screwdriver to get it to snap back up. Also, that pin sticking up in the middle of the clamp prevents you from sliding an A-S plate in from the ends. Your only choice is to catch one side under the far lip and then snap it down into place on the near side, which as I said, doesn't work.
I've asked Bryan at The Digital Picture to review it. We'll see if he does. I know he normally doesn't mess with Manfrotto heads.