I got to experience pro-level production first hand. I enjoyed observing an experienced director do his thing and manipulate a given space into a cinematic product.
What I wish was different
I wish my time there could have been longer. Maybe even being assigned more responsibilities. Overall, a bit more participation while on set.
Advice
Ask questions. Learn when it's appropriate to ask them, but once you know, ask any question that you possible can. It shows interest and enthusiasm ( just don't go overboard)