Pros
This company has an outstanding reputation which provides your work with credibility. There are a number of very talented, highly respected people with whom you might be able to work or use as mentors.
Cons
There was a surprising lack of strategic vision when it came to hiring and deploying people. I was brought in as part of a hiring surge and then it turned out there wasn't sufficient work for the people who were hired. People (including me) were placed on "make-do" assignments that had no relation to their skill set. Eventually, the work dried up even more and I was laid off. I never understood why I was hired in the first place and came away thinking this company was struggling to figure out its future path. Judging from what others are saying here, that hasn't changed.