Pros
Clean, shiny, high-tech work environment. Game room I never bothered with. Lunch room with overpriced crap like a convenience store. Free coffee, tea. Refrigerators and microwaves for bag lunches. Personal lockable drawer for 'stuff'. Occasional free lunches or other perks.
Cons
Partial job training, with lots of critical omissions, and high expectations of performance. No clear chain of command. I had four different people claim to be my boss- none of them really knew my job well, and questions were often better puzzled out alone or with co-workers than to bother asking management. Lots of favoritism, no proper reviews and likely no standards for consequential 'snap' judgements. High security environment that is not compassionate of personal issues. One girl got fired for swearing when arguing with a security guard when she needed to rush to help her aging mother who had fallen.