Seawolf has it correct. As an instructor nothing beats classroom instruction in something that has the potential to end your life. While on line inst can be good any instructor I know of will always have some classroom interaction after they review the student’s results on line Especially if they get them 100%.
Diving is as much learning from one another; I still do, as it is learning from other methods, books, online, periodicals and the like. I fear to think what would have happened to be had I not had the opportunity to interact with some of my mentors. I doubt I would be enjoying Scuba as much as I do.
Just my .02cf worth.