Pros
Many colleagues are engaged, motivated and extremely collaborative. You will learn a lot and work on some interesting challenges. Many of the line managers are genuinely fantastic people and people are generally supportive.
Cons
The company culture uses direct and honest communication as a mask for belittling, undermining and being "right" in place of constructive criticism, normally directed from upper management. Strategic direction is vague and failure to figure out the "correct" direction results in pretty terrible reactions. Work-life balance is non-existent. It feels as though they took all of the worst parts of academic culture and decided that made the ideal management method. Favouritism and bullying is common place, even if you try and avoid it.