Pros
Opportunities to work with large clients and varied industries. Humongous amount of IP and talented people. Very interesting minds especially the lateral hire ones. A place to learn and training ground for a high pressure environment. Could open huge career opportunities. Very attractive vision of "creating a better working world".
Cons
Work-life balance, homegrown management are prone to being risk-averse and not open to testing new ideas, unnaturally high emphasis on ageing forms and templates, variability in terms of level of staff engagement across service lines/competency, very time-poor projects and personnel, high staff turnover on some teams, horizontally overstretched management team but ironically have multiple layers of bureaucracy.