Pros
Flex-work arrangements were pretty solid, obviously dependent on the working group you were in and if flex-work or work-from-home was possible and applicable. The people at the company were generally pretty friendly and I didn't find it clique-ish that much.
Cons
The most glaring con that the company globally is reducing it's employee base significantly over the next few years and a lot of positions will be eliminated. Management generally doesn't recognize or reward good work, they only tend to notice employees if anything goes wrong on the client side. You will need to seriously shmooze and network to climb up, if you have the wrong kind of personality there you will struggle to move up. If any work you do can be outsourced at all - your position is in serious jeopardy.