Hugely helpful. David is a fantastic speaker and instructor. I could listen to him for days. My ONLY constructive criticism, is that the majority of his comments seemed to be to those users who are using this console in a "live" environment, versus a "studio" one.
Now, it's likely that the majority of the users with this console are indeed "live" users, though I'd like just a little more balance.
Still, this was incredibly worthwhile!