I have a walk-in gig Saturday night that will have an SQ5 for FOH/Monitors.
I use QU16/24 mixers regularly however, I have never mixed on an SQ5.
I don’t expect there to be any issues however, I am already gigging in the afternoon thus I will be getting to the evening gig with little time to spare/tinker – basically set up, line check, & go.
You won’t have any problems, as the workflow between SQ and Qu is very similar. The menus are somewhat different, but very intuitive. The menus are also very similar to Avantis and dLive in many respects. Enjoy!