Pros
It's a large company with a lot of interesting technology. Looks good on your resume. Thats a good thing because you will always be thinking about leaving.
Cons
So many internal services are outsourced that it is very difficult to get anything done well or in a reasonable period of time. It is frowned upon to mention this. I've really never seen anything like it. Low salaries. Extensive offshoring means US salaries are driven down and quality of work for offshore is much lower than most onshore. But it's cheap which is all anyone seems to care about. It's never hit me but there are often reorgs with good people losing their jobs for no apparent reason. This makes everyone nervous whenever there is a change and alot of people always have one eye on the next job as a result.