Pros
You get exposure to many technologies (mostly, microsoft stack only). Good medical, and fitness benefits and other perks. Nice to have your own office. Good work life balance.
Cons
You are insignificant part of a Mega corp. Too many meetings, politics, and sometimes it is really hard to move the needle, Too many stake holders, processes, and deep hierarchy, with everyone having his own agenda. Sometime it becomes very difficult to move the needle. You work to please your manager/lead, otherwise chances for success are slim. If your manager doesn't like you, he can screw your ratings, and there is very little you can do about it. The stuff and technologies that you learn , are mostly from Microsoft technology stack, and most of it is not relevant in other big companies (amazon, apple, google, facebook etc), or even in startups. Compensation is somewhat lower than industry.