I used our brand new SQ5 for a week of creating a musical show. I had patch problems, scene memory lost, ergonomics difficulties. But ALL came between the chair and the console 
I could not find a real default related to the console. I use the SQ5 with 2 DX168, where the 32 inputs are used. A 2012 Mac Mini with QLab and an 85-step playlist that controls the 38 scenes of the consoles in Midi and the 95 cue of the light console. The audio goes through the USB. Everything went really well all week and during our first show. But I regret that, for example, during a wrong manipulation where I crush the wrong scene, I can not recover just a scene that I will have saved on the USB key. Save the project is good, but very very long, abnormally too long.