I just received mine. I used the adaptor straight out of box on Sony fx3. I tried the adaptor with the canon L 50mm 1.2, the canon L 24-70mm 2.8 ii, the 24mm L 1.4 and the canon 100mm l 2.8. They all pretty much worked the same with the exception of my 50mm 1.2 performing a little worse.
Tracking and eye autofocus works BUT it’s really slow. Pretty much useless when it comes to recording video. The overall build quality is actually pretty good and the VND is awesome. (Not tested the color change yet).
I haven’t tested it for photography as my main focus was video.
The auto focus in video mode is very loud (maybe just the lenses) but it keeps trying to catch focus. Maybe this can be fixed in a software update? I don’t know. But for now I wouldn’t get the adaptor if video autofocus was the only purpose.