Pros
Prestigious company and leaders in their field. It's hard to get your foot in the door but well worth it, even for a short period, because you'll learn a lot and it looks great on your CV. Excellent pay. Global opportunities to work out of offices abroad, even temporarily if your job allows. All meals, drinks and snacks are free. Great social activities. High calibre staff. If you have a great manager then you'll possibly be there a very long time.
Cons
Workload expectation were excessively heavy. Consensus was, you were expected to work beyond your contracted hours. leaving on time at the end of the day was frowned upon, even when you'd managed your workload. Repeatedly extending work hours beyond your contract actually dilutes your equivalent hourly pay significantly. Living to work instead of working to live is not for everyone. I've seen hardcore workaholics throw in the towel there for that very reason.