I've had the Nikon Zf for about 2 months and done 8 weddings - it's AMAZING!
The AF is where it should be, the video is ok, I (now) love the flippy screen, BUT the Image Quality sets it apart from every other camera I've owned - the images are comparable to my Leica M10 - (in many ways better!) very low noise, film like character and perfect skin tones.
I've never been more excited about a camera! (inc. the Z8 and Leica!)