I have CH, QC and AI - CH and AI no problems encountered.
The QC however is a bit of a pain. None of the eight ‘dedicated’ EQ rotary controls light up when in EQ mode - which kind of defeats the object really as adjusting the EQ is by mouse only. They light up in the other modes and presumably I can map them to midi parameters (I will have a go later when I get back from work) but for me EQ was the main reason for buying the unit. Just wondered if anyone else is having similar issues -the whole thing does look good though !