Pros
Awesome campus with a real feeling of being part of something bigger. Pride of working for a major player in Pharma. The feeling you are working for a company that helps people get well or, at least, reduces their suffering.
Cons
No matter how much experience you bring with you, you are treated like a trainee when you first join this company. The halls echo with the call to action: DELIVER! DELIVER! DELIVER! Everyone is in such a flurry to deliver that they often forget to stop and see if what they are delivering really adds value. You must march in step with the rest of the army of employees or you aren't moving up in this organization. There is no room for people who march to the sound of a different drum... you do what you are told, you DELIVER and forget about innovation or creativity. There is a strong 'fear culture' in many of the departments and most managers are so afraid of their bosses that they create an oppressive work environment.