Pros
A nice big company with a lot of little things done right. I work in the corporate headquarters, so my own experience may be different from others, but I enjoy the following: underground parking, stylish building, a great coffee service, well maintained outdoor picnic area, weightlifting gym, and a very nice cafeteria. There's also a community of corporate tradition, and plenty of yearly events.
Cons
It's very corporate. Internal politics run rampant. Everyone knows what your "level" is by where you sit, or how large your cube is. There's organization within organization. Everything is very regimented and structured. Management is competent, but is rather demanding, and stock price driven. The biggest raise you can get seems to be 4% at most, no matter how well the company did.