I just bought my second Z camera, the Z6 II. My first Z camera was the awesome little Z50. Right off the bat, the fit and finish of this Z6 II is outstanding. And I'm picky. My standard for high fit and finish is set by my SP, F2, F3, F4, F5, F6, D850, Leica CL, Leica Q2 and Leica M6. This Z6 II feels like a brick covered in rubber, the perfect heft, perfect balance for the lens, on and on. An ergonomic rock star. I just can't put it down. It is a fraction of a second behind the F6 and Q2 in the race for being the 100% perfect feel good brick in your hand.
But, this thread came up when I was searching out one fault I found. My Z6 II is making a slight crackle sound under the D-Pad, and also a much more pronounced squeaky / crackle sound on the left side under the ports. Even the slightest graze of pressure makes the crackle sound. And it is most certainly not the rubber port covers. I've moved them out of the way, and the sound still is present with any touch what so ever on the left side of the camera.
This is disappointing, as I can really hear it when the camera is up to my eye and my left hand is cradling the camera. Once you hear it, you can't help but hear it every time! I suspect it has something to do with the water resistance measures, at least I hope that's what it is. Surely there's lots of little membranes, gaskets, and so forth underneath it all. And maybe this is how Nikon does it with this camera. However, my F6 and Q2 don't make any such noise, and they're drip resistant. I don't notice anything like this on the D850. The D850 is a marvel of a camera, but in terms of that rubber covered brick feel, it aint it. This Z6 II is though!
I am so torn whether to take it back to my camera shop or not. If the consensus on the internet is that it's indeed just the way things are because of the weather sealing, so be it. I just don't want it to be due to poor workmanship. Since the rest of the camera is so awesome, that would be a bummer.
Other than this annoying noise, I am so thrilled with the Z6 II. It has been superb on every level. And if you think the autofocus doesn't work very well, my advise to you is to go and carefully re-read the instruction manual

If you lost the Nikon manual, go buy Thom Hogan's manual.
Thanks for any advice anyone can offer
J