Pros
Relatively equitable salary and health benefits. I suppose as a research chemist in a large company, I was able over the years to command decent budgets for new equipment and supplies. Generally, I was able to attend at least one scientific meeting per year, and interact with colleagues outside of the company on occasion. The facilities were on a par with other places I have worked (lab, equipment, library, computers, cafeteria etc).
Cons
Where do I begin? Support staff is the biggest disappointment. Dupont management is terrified of unionized technical help and will do anything to keep the techs happy. Consequently the PI's are at the mercy of the English major technician mafia, and God forbid if anyone tries to right the apple cart or complain in any way. Next I would fault senior management for allowing PI's to work on sophomoronic and impossible goals. But then, most managers are so as they were the least competent at science in the first place. They bring true meaning to the company's motto "Miracles of Science". Meanwhile Dupont's patent positions suffer in so many fields, further lowering morale.