Mine arrived yesterday and I haven't had a good chance to get out of the house with it, but I'd be happy to answer any questions or perform quick tests if anyone is interested.
Initial impressions are that it seems really responsive.
I've not really used autofocus much, but this camera has definitely changed my mind about it. I think it will take some time to figure out which combinations of settings work best for what I do, but that is usually true of any new camera.
In comparison to the Z6 it seems quite big but I think it will balance larger lenses well.
The original FTZ works - once you apply a firmware update - and non-cpu lenses work the same as on the other Z cameras.
Default raw images out of the camera are neutral and a bit flat, leaving room for post-processing or applying in camera picture controls. This is kind of how I like it, but makes things a bit dull in the viewfinder compared to what you see on the back of an Iphone. With video this is even more the case, but there is a preview mode which can be applied if you are shooting in 10bit n-log to get a better idea of what the footage will look like.
Controls are pretty well laid out, and are incredibly customizable. It will take me a while to finalize on how I want things set up. The one troublesome thing is that one of the buttons for the vertical grip is easily pressed when the camera is sitting on your lap reviewing images. I'll have to see if there is a way to disable this, or just hold the camera differently.
Anyway, feel free to ask questions if you have any. I learn by answering them so I'm happy to investigate.