Pros
Experience working with a global company is invaluable. Many opportunities on the consulting side to work just about anywhere in the world there are IT needs. Boasting wise - it is a world renown company which looks good in your portfolio. If you take advantage of networking opportunities you can meet some really sharp individuals who can aid you in your career growth.
Cons
The amount of time required to complete work often requires late nights, early mornings, weekends. In other words, expect to work 50+ hours on a regular basis to complete just the bare necessities of your workload. Also, formal training in a classroom environment is rarely permitted. Salary increases is quite the exception for 'good', 'reliable' workers in or out of a recession. Exceptional performers who produce intellectual capital and certify in various disciplines see an increase in their salary.