Pros
Dupont really does take care of its people. Once in, you're in. But, this same pro can be a major con b/c dead-weight cannot be terminated. There is no accountability in DuPont - you're left to your own devices to build a niche and succeed. This can be a pro, or con, depending on your personality.
Cons
Dupont has the feel of a sinking ship. The workforce is heavily weighted to 55+ agegroup, and the company has made little/no effort to succession plan. Retirement eligible people hang around forever in hopes of a layoff, so they can get "paid" to retire, then many of them end up coming back as contractors or partimers b/c the company never trained replacements. These leaches on the system, like with GM and Ford, have sucked the life out of the compensation and pensions packages, so thirty-somethings like myself will pretty much get nothing.