At the end of this month I will be doing a program to go from Open Water (which I am now) all the way to Master Scuba Diver Trainer. This includes Advanced, Master Scuba Diver, EFR, CFC, DAN O2, Rescue, Nitrox, Divemaster, Assistant Instructor, EFR/CFC Instructor, Open Water Instructor, Master Scuba Diver Trainer & DAN DES Instructor. I got all the materials for all of these courses today and would like to get a brief overview on what I'm in for before starting the program. My question is, what have all of you found to be the most difficult part of this type of program? What would be of beneit to look over thoroughly and what should I just skim through and not worry too much about? If there is anything you guys have struggled with please let me know so I can prepare myself beforehand a little better. Thanks for any input you guys can offer.