Pros
Relaxed atmosphere. Middle management trusts your ability to learn and is ok with trial and error. Possibility to move up quickly if you are working on the right projects.
Cons
Crazy turnover : people tend to leave after less than a year. Low wages for developpers, almost no training. Very political company : what counts isn't the results of one studio but who your studio manager is friends with. Ressource allocation depends on politics too, resulting in a vicious circle : favoured studios can hire talented people, while the others do not have the ressources to get better. Bureaucratic : every single initiative needs to be approved by dozens of people resulting in crazy threads with 20 people from all over the world giving their opinion, usually resulting in status quo. No company culture: I still wonder what are the core values of Gameloft.