Pros
The best part about GLG is the environment, and the caliber of people you'll work with. I worked primarily for the marketing team, which has grown quickly and has completely re-invigorated the company's digital properties. Lots of great talent and experience on this team. The NY office itself is full of fantastic, interesting characters. Sit at the espresso bar for a bit and you can speak with people from every area of the business, whether it's in regard to GLG or shared outside interests. There are many young, hungry, resourceful people that make day-to-day life quite pleasant. I made plenty of friends in a year and a half at the business.
Cons
Role progression isn't the most clear-cut when you're transitioning from one role to the next. This could be improved upon.