In my experience, it's been mostly poor time management way before sim. Aka not studying flows, callouts, limitations, systems, etc., then getting to the sim and knowing nothing you need to by that point. I've seen a few guys get passed on through EFPT that probably shouldn't have, then get hosed when they get to the sim. EFPT is designed to correlate everything you've learned on your own to actual routine, not to teach you procedures that you haven't made a tremendous effort to learn on your own, which is where I think some guys get it wrong. Lesson: study, know it, do it. No time for teaching by the time you get to the sim. Every lesson is packed, and you will use every minute of the 4 hours every session with very little time for do-over. Time spent teaching in the sim is time lost toward progressing toward the next lesson, and once you're behind, it's tough to catch up. They'll give an extra sim or two, but you don't want that either trust me. Any do-overs you may have make you instantly fireable.