Pros
What pros can I say..... I would say if you're wanting to see how an ad agency shouldn't run then apply, saying that if you're lucky you can actually learn from a colleague or mentor. But you could just be thrown into the grinder and tasked with achieving unrealistic goals and if you're really lucky you'll only work on one client and keep your knowledge of the industry extremely limited.
Cons
There aren't enough characters for me to list all of the cons, but I'll try my best. For starters, you'll have two-faced managers who say they have your best interests at heart and then never follow through with anything they promise, especially if it's meant for your career growth. Once past that discretion, if you show any leadership qualities or the ability to teach others you will then be "promoted" to a manager without the pay or recognition, but you will be given the work that comes with it. Then after all of that if you are of any other race than white or go to any other school than ACU or SMU you'll be looked over in your application or in the workplace for proper compensation/respect.