Pros
Surrounded by very knowledgeable people, used to be a master on their field. A lot of will to do better. Your colleague is a person who think before the action. Several opportunities to have experiences abroad. A good work life balance but also a strong pushing when required. A very wide range of technologies you could learn and professional figures you could be or interact with: an incredible training, if you are lucky. Good facilities.
Cons
The cons of a large, too large Company without a guidance in a period of recession: management does not know what to do anymore. Politics shall support Saipem, but in Rome they just want to be clean, that is: "do nothing, so we don't get impeached".And it is very bad. In lack of deep general guidelines and philosophy, a lot of energy wasted in micromanagement and in the codification of that.