Pros: Great People
Cons: Overall dull environment, silo teams, doesn't feel like team work, long hours - work through lunches and after or before hours.
ADP is full of great people but since the people have been there so long there's a lack of trying new ideas. They work hard but not smart. The environment is dull and lacks life. The office does not seem to have an open door policy (the doors are literally close most of the time).