Pros
Very relaxed office environment. Open floor plan that people often decorate for birthdays (but stays up for years). The people are really encouraging and want to help each other succeed. Good work/life balance. Part of the larger Kantar network, bringing a level of cache.
Cons
Part of the larger Kantar network, leading to corporate politics/growing pains. Very resistant to change, even at projects' expense. Many processes are done offshore, causing delays, headaches, and rework. Despite best efforts, most processes require redundant work, slowing down teams and minimizing time spent on actual analysis. Difficult to move up beyond entry level positions in a timely manner. Takes 10 years to reach middle management (Strategic Director) and 15+ to reach VP. No exposure of methodologies outside one's specialty. Difficult (but doable) to switch teams.