Pros
Depending on the business group, the company provides decent options for flexible work schedules, telecommuting, and vacation. Minimal travel is required for most groups. While a huge number of the employees are average at best, there are a number of top-notch performers that keep most groups productive and profitable.
Cons
The overall compensation (salary, bonuses, health insurance, 401k, etc) is just short of atrocious. This compensation is very explicitly not tied to performance. Managers typically put little effort towards employee reviews, which end up overdue and lacking on content. The middle management is awful; most lack any form of natural leadership or ability to track basic tasks or manage even small groups. The upper management (Directors & Vice Presidents) are somewhat more competent, but that group is largely disconnected from the rest of the company (Consultants and Senior Consultants).