Vantaggi
My experience was that I was relatively able to work peacefully and with any accommodations I needed. Benefits were pretty good, not stellar but decent. Some management people are very decent and direct (mostly people from the UK and a couple from India).
Svantaggi
Upper management is not fully transparent with their dealings and objectives, and they of course claim they care about their people but they will still go ahead and not be honest with you until it's too late. There are not many career progression opportunities because of the size of the company, and only the same people will get recognition over and over, even if other people helped out with projects as well. Also, upper management is a closed-knit circle in a way and they will defend each other no matter what. A lot of the very decent people I met during my time at the company left so that should tell you that this ship might be sinking slowly.