BUILD QUALITY
Everything OK, except the battery door, which is very flimsy, especially the latch
BUTTONS AND DIALS
Buttons are where they should, the AE-L/AF-L button can be remapped as AF-ON (Menu...Controls..f2).
Be careful, I was fooled the first time around, with the factory default it looks like there are only 3 options available, but if you scroll up the rest of the entries become visible, including AF-ON!
The absence of a second Fn button up front is not justifiable even by aesthetics, if they wanted to make a perfectly FM/FE looking camera they would have had to exclude the front and rear control dials (which are absent throughout the Fex/Fmx series). Are they working to pull out a ZfcII, like they did with Z6II/Z7II ? I remember Nikon being more serious than that!
It is possible to use the red Video Record button as an alternative to the missing Fn2. The default when not in video mode is the BKT function, most functions that can be assigned to Fn (but not all) can be assigned to the Video Record Button.
The exposure compensation dial is a little smallish, I can live with it, but others did not like it. You can avoid using it with most AF-capable Nikkor Z lenses (24-70/4S and 2.8S, 14-30/4S, 14-24/2.8S, 28-75, 24-200, ...), by mapping the Lens Control Ring (bottom menu option in Menu...Controls..f2...Custom Controls (shooting)) to Exposure compensation. It works flawlessly and smoothly, naturally you lose the MF feature in the lens (can use only in AF modes), but then if you use fully manual vintage lenses you don't lose anything, the focus ring works as usual with vintage MF AI-AIS-nonAI-RF lenses.
One notice: in order for the mapping to work, the exposure compensation dial has to be set (to the 0 position) to the dedicated "C" position opposite the 0 position on the compensation dial, otherwise you turn the Lens Control ring and nothing happens. With that smooth operation you are free to concentrate on the image, and the exposure compensation is visible on the viewfinder (the image turns darker or lighter, and the amount of compensation is shown on the R side).
Ciao from Massimo
[EDIT: corrected the needed setting of the compensation dial to have the Lens Control Ring work as expected]