Henry,
I've seen it and tried it briefly in front of a shop with my own scope on it. I hope to loan it for a field trial some time in June.
I was surprised to see that although the supplied QR-plate is small, the head accepts the long QR-plate of the Gitzo 2380/Manfrotto 501 heads, so balancing is possible to some extent. Initially I thought that the default drags were too light, but pans and tilts were smooth and positive nonetheless. Unlike the 2380, this model does not have separate locking levers or knobs. Rather, you use the same knob for both friction adjustment and locking. At least on the sample I tried, there was some residual movement left after tightening the knobs as much as I reasonably dared to. I did not have time to experiment with the spring-loading adjustment, so I don't know how well the adjustment works in practice.
The head looks good and is very light, and relevant interfaces (head-to-tripod, head-to-plate) are metal.
All in all, I want to try it out since it seemed to have promise as a lightweight complement to my 2380. It did not initially impress me as good enough to fully replace its bigger brother, although it did seem as it could be better than the Manfrotto 700 and 701.
Also the way it felt under a Fieldscope 82 ED A made me suspect that 2kg would be the upper weight limit for it, and that it might be better with shorter scopes than long ones such as the old Swarovski, Kowa 820 series or Leica 77.
I'll post more impressions if I get a chance to use it more.
Kimmo