Pros
Salary and compensation package are comparatively good. If you like the huge company atmosphere, I guess it's got that. Generally work/life balance issues aren't a problem.
Cons
Morale is low. No one communicates meaningfully with anyone (although frequently pointless meetings and mountains of irrelevant emails are a mainstay), and everyone's got an angle they're working. Senior leadership often doesn't talk to their own direct reports. Direction shifts on a whim. Few decisions are made based on common sense. Nearly all decisions are over analyzed and under executed (analysis paralysis). No one faces reality when a bad decision is made -- they just jump to a new project instead. Almost no one understands their impact on the customer, and frequently people fight to protect their little piece of the world, oblivious to whether they're helping or hurting customers by doing so. Almost no one sees the forest for the trees, or even tries to. Leadership tends to be either heavy handed and top down, or almost non-existant -- very little happy medium to be found anywhere. Innovation is often sacrificed on the altar of "conformity and consistency", even though senior leadership speaks of "innovation, innovation, innovation" all the time.