UPDATE September 10 2017
I recently posted an article on my use of all Godox units in one session. The article includes the use of this product. You can view that post here.
UPDATE: November 21 2016
I shot with the 1200ws head during an on location tango shoot in the Mohave desert. The unit performed flawlessly and gave me the ability to do things that would have been difficult or impossible with only a 600ws head. The innovation and flexibility Godox/XPLOR offers photographers is excellent.