Pros
So many of the people in all locations are genuinely wonderful, talented and passionate folks. They are willing to help without being asked, and are actually tremendously nice and friendly. Travel between offices to meet and work with your geographically diverse colleagues is encouraged, and they always make you feel at home. The technology is interesting and the stated mission is cool.
Cons
Some in leadership don't care to listen or acknowledge ideas from employees, and are often more concerned with their own image than the betterment and growth of the company. It can be a little Jim Jones(y) around the CEO. He is smart, but is a short term thinker rather than long term planner. Some of his direct reports also have the inability to challenge him and themselves, as status-quo seems more popular than risk taking and market disruption. The open office layouts are needlessly stress-inducing, and detrimental to productivity and creativity. If you have a paranoia complex, you will have daily panic attacks. Finally, there is a major and unspoken ethical issue in how they obtain some information. No, not the conspiracy theories purported in the media, but the use of certain tactics to obtain information that should best be left to officials in law enforcement and intelligence/military. Then again, they were funded by the CIA and Google.