Vantaggi
Deloitte gives you a ton of experience and basically acts as a very intense training program for Business Analysts who are just out of college. You're given a lot of responsibility, and it'll give you a lot to put on a resume and to talk about in future interviews. For me, it really built my confidence because I had just about every potential problem and challenge thrown at me, and always managed to figure it out and come out the other end having learned something.
Svantaggi
Absolutely no work-life balance. The culture is to work at your client's office 8:30 to 7 at minimum, and then to go back to your hotel and either continue client work, or do 'firm initiatives.' It completely burns you out, but the company doesn't care, because that's just their business model. They always have a new crop of BAs graduating from college and ready to replace those that have left because they can't take it anymore. Also, as a BA you have very little control over what project you get staffed on - you will basically get shipped off to wherever you are needed, regardless of your interests. And at the end of the day, most of the work is really just not that interesting - clients are paying us to do the work that their employees don't have time to do, and to put in tons of extra hours to get it done as close to perfectly as possible. Again, you learn a ton, but it's because you get so many impossible situations thrown at you that you have no choice but to figure a lot out as you go.