Pros
It's a large company with many projects and different opportunities that you can work on. There are perks like the parties and picnics and team events. Each year after your first you get 10% of your take home salary put into tor 401k from Booz. Depending on your client and project manager, it is usually easy to do things like work from home and have flexible hours.
Cons
More than once I have seen people getting promoted that don't deserve the promotion. It is like the managers give promotions in order to have people below them getting promoted and this helps the managers career. More than once I have been told I would be working on one project and then actually been put on a totally different project. Management hasn't been honest with length of time going to be spent at client site, keeping me there longer than originally planned. Also, I am pretty sure there are people on my team that were hired strictly based on their looks.