Last night I had to use an A2 as monitor guy that had no prior experience with computer mixing - neither SAC or AMP. His normal gig is FOH on an X32 these days. I put him on the AMP rig with my normal monitor mix window set. I had a remote set up on my laptop at FOH so I could jump in if he ran into issues.
The only thing I wound doing is setting up the channel labels (since I was doing the input list on the fly on my Profile as well as his desk). He handled everything else himself. The only instruction I gave him was here are faders, here are aux sends in the monitor view, here is the channel strip. Have fun.
End of the night all I heard from the band was everything sounded great and no issues. The engineer had no issues and sat back relaxed all night. This simply could not have happened with SAC.