Pros
Gives you a good sense of what a terrible company is like and what company to avoid in the future. It's a decent place to network with people who've left the company for much better opportunities.
Cons
To paraphrase the venerable words of a departed supervisor "Contrary to the old adage that life is long periods of boredom punctuated by moments of sheer panic -- life in PPD is like long stretches of panic that is rarely interrupted by moments of boredom". Such is the life at a company that 1) Overworks its staff-- assigning work at above capacity leading to burn-out. 2) Pays little for a technically demanding job (starting at 14$ an hour folks) with 2% "raises" every year (which is about the rate of inflation). 3) Many poor managers who aren't suited for the job, and suffer little to no consequences for poor management. It's no wonder that PPD suffers from terribly low employee morale, depressing work environment and massively high turnover rates (as high as 40% in some departments). The few decent managers are left trying to desperately replace the constant losses and suffering the consequences. The company is a haven for short-sighted policies that doesn't mind trading in their organs for a couple extra dollars.