Pros
Some good people, some good benefits and a severance package when you get layed-off. There are opportunities to be put in a position that no other company would even consider you for, particularly if you are a sycophant.
Cons
The company identity in the US is confused and seems to be changing into Genentech, but not quite. Most management, at even the highest levels, seems lost at times. The Nutley NJ site seems to be destined for continued down sizing and really should be put out of its misery. The medicinal chemistry dept. that brought Valium to market has been turned into a “World Class” joke. This is partly due to new incompetent management who sought guidance from incompetent and narcissistic “retired” management who rose to that level through the attrition of truly talented people. Unfortunately this seems to have become standard practice.