The different functions of the organization make for a disjointed cluster of departments and specialities. This makes advancement and career development somewhat awkward. This is a good place to end your career or a place to work while API pays for school, not a place for growth. Some department are an absolute dead-end.
Also, some people may have a political/moral issue with working at API. As a conservative-leaning person, I've always drank the cool-aid and have felt a certain satisfaction in working for the industry. More liberal leaning people may have more of an issue with that. Either way, get ready for political arguments with friends and family.