Pros
Potential for great opportunities, provides great resources for certain jobs, great learning environment given the variety within one company. Headquarters is not in a major metropolitan area. Surrounded by incredible people in my group.
Cons
Good old boy system in many areas, getting fair chances at success becomes game of who you know and not how well/hard you work, required to sell yourself and get your name out there to achieve success, top heavy with young ladder-climbing managers not interested in actually helping the people they manage. PMP system completely broken with biased and uncontrollled management decisions allowing for inconsistent ratings/rankings that negatively affect employee morale. Ranking against "peers" has created unhealthy competitive environment where people will step on their teammates to benefit theselves. Creating unfair peer groups to be ranked against when the playing field is really not level (SMEs vs. generalists, any discipline vs. chemical engineers or chemists). Forced distribution ranking in small high-achieving groups where ALL members exceed expectations otherwise they would not last long in the group.