Very noisy matrix. Nikon officially states on its website, "Whether you're shooting movies or stills, image quality will be superb across the widest range of ISO 64-25600." The reality is just depressing. Shooting at night is simply impossible, I present a frame (enlarged) shooting from a tripod at night with little backlight at ISO 8000., in comparison with what Nikon promises. But by the standards of the Z7 ISO 8000, this value is below average. The image just doesn't work. Where is the promise? You can actually shoot with this camera at ISO no more than 400. If you need to draw shadows from RAW according to the plot, then the ISO used should be no more than 200.
Focus works well in static on medium-sized objects. The focus can be fixed by pressing the "OK" button, then move the camera, moving the desired object and tracking will turn on. But if a car or a person moves, the focus does not keep up, disappears or lags behind. The processor is weak, there is not enough memory.
There is no focus on the eyes, on the faces it is very poor, unstable and on motionless objects. Pointing the camera even briefly at bright objects, sunset, sunrise can disable the matrix in a second. And in a SLR camera there is a mirror that protects the matrix. Nikon Z7 is strictly forbidden to photograph sunrises, sunsets. There is no flash, which is very unusual and inconvenient, as it is not possible to use a camera for travel.