Pros
The size, global locations and diversity of positions allows for movement within the company w/o loss of benefits, salary or accumulated time. There are >160 companies & 1,000 different sites around the world. You can make a comfortable living and if you don't do anything wrong can gradually move up in management or technical ladders. If you are not appriciated you can move somewhere else.
Cons
Very political. Certain people are targeted as "Golden" and are given all the chances. The rest have to settle for gradual advancement and secondary positions. However, just like the weather in NJ, "If you don't like it, don't worry it will change soon", and management changes over quickly. Once the Group Company Vice Chairman leaves, then every body below is reshuffled and a new regime takes over. This happens about every 2 to 3 yrs.