Pros
Offer very good benefits and recognize the work-life balance is important. They respect your personal life and realize that things happen during work hours. They try to help improve careers and are willing to assist in the learning process. Safety is very key, sometimes overwhelming, but every personnel's safety, including contractors and visitors, is high priority. Rich culture environment with people from many different backgrounds and cultures.
Cons
Due to multiple sites being miles apart, communication and meetings suffer a bit. Some days feel like you're driving more than work. Most communication between sites is done via phone conference meetings which take away from meetings at times. Favoritism of different sites also exist among some managers. They are attempting to improve communication, but it still has a way to go.