Very happy with this upgrade!
This was an upgrade to my D750 that I have loved for 6 years and I was nervous about the difference. However, after taking the time to really learn my manual settings on the D750, learning this Z was pretty easy. I'm sure that there is still a lot more for me explore, but so far I've been super impressed with the quality of the pictures and its ability to work with low light as there is so much versatility in the settings. I love the high shutter speeds and its ability to be almost completely silent. Using the CFexpress card spot is definitely a better option than the using the SD card when it comes to speed, but its nice to have a backup slot still. Though you definitely want an extra battery or two, I found the life lasted longer than I expected for the amount of shots I was taking of a stage production.