Pros
Excellent growth, fantastic culture for technical people. Leadership is good, but unilateral. Company throws (or used to throw) great parties for customers and partners. There are lots of venues to learn and share information, but it really boils down to who you know and how much they trust you. Tenure doesn't mean much since most of the senior staff have been there for long times, but if you're willing to work hard to get ahead, there's lots of opportunities. You need to be able to recite technical documents verbatim to impress senior leadership for promotions or raises. Promotions won't come often, either, as they have more often gone outside of the company rather than promote from within any more, which is funny since that's how most senior leadership got to where they are.
Cons
Blind to faults or shortcomings of products. Too much "build it because we know best" mentality. There would be more career opportunities if the economy was better. Recent reduction in force ensured senior management got their bonuses at the expense of those who lost their jobs. Nothing noted or released to the press that the executives were foregoing their bonuses to keep the company in the black. The culture is one of fostering growth, but the problem is that people hoard data and information to make themselves more important. There are also the usual "clique" type mentalities that have to be dealt with in order to get information and to get ahead. Leadership is good, but unilateral. You're expected to pull yourself up by your bootstraps without the moral boost if you don't work in a corporate office.