Pros
You will learn a lot in a short time (out of necessity, turnover, and lack of appropriate staffing). You will learn about the business side of big pharma Global teams are intelligent and sincere professionals, but severely understaffed. Local site teams are ignorant, unprofessional, and ego-driven.
Cons
Lack of resources Extremely unethical Everything is about the bottom line, profits over people Leadership is corrupt - poor performers stay in positions or get promoted because management doesn't want to deal with performance improvement plans. People get fired over innocent mistakes or misunderstandings. They will "manage you out" if you have a strong quality voice because you aren't "pragmatic" or "flexible" enough for their business deals and customer relations. Sexism, sexual harassment, grooming, and racism is still alive and well. The "good old boys club" is still going strong. The site leadership team feels incredibly entitled and powerful and their egos and competitiveness are immediately apparent. If you know how to play the game you can make it very far in the company - I did - and I still don't have really any positive things to say. You will give them your blood, sweat, tears, marriage, life - and in return they will give you sub-par pay, multiple jobs, no time off, years you can't get back in your life.