The process is designed to leave you clueless. That's how I felt anyway, especially after day 1 (back when it was a 2 day affair). However it's how you play to their tune on the day, which if you do enough research and practice, you can train yourself to perform. In essence you are training yourself to fit their psychometric profile. I think experience is important, those overly experienced (people with command time) or those having experience of previous DEP campaigns need to seriously adjust their outlook or not bother IMHO. The sim is much more straightforward and effective CRM with good implementation of decision making models will see you right. For Boeing guys, the 744 is very manageable. But of course DEP is a Airbus only now so as an insight the little toggle switch on the control column is for trimming!!