Pros
Compensation is good. Diverse workforce at the bottom where real work gets done. HQ facility is top-notch. Barring unforeseen disaster this company isn't going anywhere. Work-life balance is great. If you play the game right you will learn useful skills. If you're lucky or make the right friends you can rise through the ranks.
Cons
Middle management is very bad. Cliquish is an inadequate word for how insular it is. Execs at the top basically lucked into the goose that laid the golden egg back in the '90s and have squandered shareholder value since then. 10 years of massive nonsensical acquisitions during the late 90s-early 00s only to do a 180 and sell it all off for pennies on the dollar as the market tanked in 2008-2010. Execs still made millions of course and think they are infallible. Only one real product left (DNS) Since divesting almost every product other than DNS resources have been wasted trying to come up with new directions without any success. Company is now run by the CFO and the squeezing has started in earnest. The negative consequences will start showing up in the next few years.