The biggest money-makers in my studio are the GFX-50s, and the Schneider APO Makro 120mm F/5,6 Digital. Because the combination - in between which a Cambo Actus GFX and Cognisys StackShot 3x are sandwhich - is far from pretty, the Schneider must wait for its day in the sun.
The GFX is slower to use at high magnifications than the Leica SL, harder to focus, and louder, but its output files are worth the hassle. (Incidentally, the above image was captured by the SL.)
Compared to my previous setup, in which I had to focus via ground glass, it is a real time saver.