Pros
This is a company that employs very professional, high-caliber consultants. It's not as big as the very large consulting firms so it is more selective in the people they hire. Quality, not quantity, is the name of the game when staffing client engagements. Internally, the company is small enough to have a "boutique" feel. Communication to management is very open. The office culture is such that work/life balance is emphasized.
Kontras
Being a consulting company, its employees are expected to travel. Even though the company has 20+ offices worldwide, client/project locations are not usually limited to each office's home city/location. This is not necessarily a "con" but a simple point of comparison when considering small consulting firms that may be limited to only working with clients that are located in or near the home office's city.