Pros
You gain a lateral understanding of the chaos that is film production. It's a good, stable launch pad for developing relationships within the film industry to leverage should you desire entry. You learn A LOT about time and relationship management, and get good perks like free lunch (no lunch break though), Christmas/ NY always off and paid overtime. Expect your working relationships to fall into the 'dysfunctional family' category, which for me personally is not without its charms.
Cons
The phrase that comes to mind is 'wild west'. Things are rarely done by the book, there being no company book to do them by. The resistance to establishing a functional structure is fully intentional for reasons that only become truly evident over time, but this means that as an employee you have to either develop techniques to manage/ curb the inevitable fallout, or else you struggle constantly against it. I would be tempted to say that the director is the only beneficiary of this approach, had I not been there long enough to witness how truly short-sighted the whole thing is. Additionally, there is neither desire to expand nor to upgrade the 20-year old facility.