Pros
Wide variety of work, tasks and clients (in the DC area, anyway...other geographies are more limited). High caliber of employees, colleagues and teammates. Supportive team environment. Fosters individual growth and development. Good benefits. Ethical, value-oriented, supportive organizational culture. Mentoring is promoted and valued. There are opportunities to work abroad. The firm is very supportive to employees who have to relocate due to military family moves or other reasons employees have to relocate. While they can't guarantee they will have a position for you in your new location, they have an entire team dedicated to helping you find a new position and make every effort to do so. Great access to upper and senior management, including Partners.
Cons
When I first started 10 years ago, the firm had separate vacation and sick leave banks, and the sick leave was UNLIMITED (yes, you read that correctly). They then switched to one bank of Paid Time Off (PTO) to use for sick time and vacation, so you are basically penalized by draining any potential vacation time you have if God forbid you get really sick and have to use up all your PTO due to illness. On top of that, the amount of PTO time is not very generous and is accrued based on your career level and years of service. So, if you are an entry level consultant and just starting out, forget about earning much vacation time until you have a few years under your belt and promote to higher levels. The firm also promotes a work-life balance, but in my experience this varies by individual team, and I've seen little work-life balance demonstrated.