I just finished PADI's Nitrox 40%. There were no suprises or I didn't know that moments, except for the EAD table. We were informed there will bo NO dives for this cert. I could have bought a book and tables and have been good to go. Glad I got a $30.00 discount anyway.
Kind of my thought on a nitrox class. I mix my own nitrox. I can read the table, and calc my MOD. Perhaps when I go on a dive vacation where i need nitrox, I'll take the class just to have the c card for nitrox, but until then, I'll make my own.