I spent hours and hours trying to get it to work consistently on my PC and my 24-70L. Part of it was me, but I finally got it going.
There were no issues with the main AFMA portion, I was trying the extra tools like the testing of each AF point, the dust detection, the aperture test, repeatability, etc.
Eventually, I got them all run on my laptop, but my desktop did not like it. Its getting old, and might have some issues.
I'd like to spend more time and do it more carefully, but after running the wide and telephoto AFMA tests three times with the same results, I'm happy. First, I need to reread the manual. The AF point test seemed to vary, I think that I wasn't properly setup.
I will be looking at my images closely just to make sure everything is sharp.