I only have it one day now, but I had read a lot before I got it, including all these pages here
I like it a lot. Gives full flexibility with all my lenses and new possibilities with my Rodenstock's, Angenieux's, Visionars and others... I followed some tips Jack gave, with fn1 in zoom 200% and fn2 zoom 50% That works great in combination with the peak highlights. Focussing was never so easy and clear. Also very convenient to switch continously between the back screen and the finder.
The Focus-point you can center in the Custom Settings with f3 OK button Shooting Mode -- > Select center focus point. Clicking on the OK button will immediately center the focus point.
A slower start up time means you have to adapt your working ritual. I have no problems using one card, but that Nikon forces their customers to use extremely expensive XQD cards bothers me.
Tested the 55mm f/3.5 Macro from 1963