O.K. I've used the head every day for the past week, fitted to a Gitzo carbon mountaneer, so here is an update.
Although the head appears very flimsy, it seems to work reasonably well.
My main complaint is that you can't lock the vertical plane one-handed with a twist of the hand-grip, as I'm used to doing with my Gitzo heads. However, most other heads don't lock in this way either. I find the Swaro head locks well in the vertical tilt plane with no discernable shift of the scope, and no slip even with a heavy load (Coolpix 4500). The horizontal plane (pan) lock does cause a shift of the scope when applied, but I rarely lock in this plane, just keep the friction quite high. The resistance to movement adjusters work well in both planes.
The quick-release made me nervous due to its delicate looks, but I can't make it release when it shouldn't. That said, I wouldn't like to see my new scope and digi-camera fly off so I carry it very carefully when fully assembled.
Advantages of the Swaro head;
Light weight, small and neat
Easy Swaro compatability as it takes scope foot and Swaro extension plate without need for adjuster
seems to work o.k. with or without digi-camera and Swaro hinge-bracket.
Disadvantages;
Outrageous price
Nearly all plastic and looks like it could break easily, but perhaps the "unbreakable" material is better than it looks.
It does not appear to be a fluid head (although I can't take it to bits to check, unlike my Gitzo heads)
I think this head only makes sense if you have a Swaro scope with digicope extension plate and a very lightweight tripod. Even then the price is too high.