Pros
There were lots of talented people, and decent work environment. Good benefits and work life balance.
Cons
It is the Kingdom of politics and backstabbing. Senior management interested only in processes. Middle management is of the poorest quality and self absorbed. If you are part of the clique the MSCI old timers you have a shot at career progression. And please don't even think you criticise, God you are too negative and they will punish you when it come to bonus. When it comes to promotions all is based on how you are visible inside the company or how well you have shmoozed with somone senior who will sponsor you, not on performance. The company doesn't take care of people who work hard and are loyal. When they hire new people the pay market rate, even if it means that it will be 30/40% more than someone who has been there and has done year on year a really good job.