Pros
There has always been plenty of diverse work opportunities, which has been a good resume builder. You can often work from home. A driven workforce with plenty of smart people. The matrixed structure, which has negatives, also has positives in that you can easily gain a network of people who can help you down the line.
Cons
Most people seem to wear a corporate mask. Every once in a while you meet someone who behaves like a normal human being, and it shocks you. You are on your own to find work. If you don't have work for a while, you are gone. Teams are all over the place geographically, which increases even more because of hoteling, making it incredibly hard to collaborate effectively with teammates, and the work quality suffers because of it. These three things above make the overall work experience not enjoyable, and cause a detachment with other employees, even with teammates and bosses - and not the camaraderie you'd get at better companies. Management is inconsistent. As a technical person, I would have thought that a company of this size and distinction would be more organized and use proven methods for managing technical projects. In my experience, most of the people managing us had no idea how to do it, and were just winging it. Very disappointing. The company generally has an attitude that its employees are the best of the best, but it has shocked me how many people I have worked with who don't have much in terms of ability or passion. There are a fair amount of smart and driven people, yes, but they seem to be outnumbered by the ones who aren't. Reading other people's reviews, apparently this is a somewhat recent trend in the company [which started before I got there], and unfortunately may be growing.