I have been thinking about getting one for a while and with recent sale, couldn't help my GAS. Wanted to test it out with real shoot on Saturday but had not much time to feel comfortable with the camera so ended up taking some test shots in the house on Sunday. Compared to my XT1/56mm f1.2, GFX/110mm f2 is incredible detail wise. AF is not bad with the 110mm f2. Only thing I notice is that 110mm f2 keeps making noises even when just holding the camera with camera on. No shutter press where it needs to focus or anything.
XT1/56mm f1.2 @f1.2 from 2 yrs ago
GFX/110mm f2 @f2
Web size doesn't do any justice to compare the two. Will be testing the GFX against my 5dmk3/85L in coming weeks.