Pros
Nothing beats working for a global household name. Potential to learn, international perspective, respect in the industry (mostly until the crisis ). Entrepreneurial environment but don't look for management support. Once you show you are capable, they tend to back off but no team work can be expected. Stayed a long time and ultimately made good progress but toughest environment I've seen and I've worked at a number of high profile tough places.
Cons
Never worked at a place were management places so little value on their employees. Cronyism prevails, as does sexism. Poor governance continues to be an issue, even after bailout and repayment if loans. Only act when they are absolutely forced too. I.e. Icahn currently trying to impose better mgmt. Be prepared to do battle at every turn and deal with people who guard their territory. Surprising the Board puts up with executive mgmt. Never admit to mistakes.