Pros
You can learn a lot in a short period of time. Lots of smart people and they run a tight ship which is all good. A great place to start your career or until mid level
Kontras
Top down management always. Boss is always right attitude starting with the CEO and all the way down. Professional growth is limited unless you can build good relationship (read "sycophant") with manager. Not a good place to move from the outside for middle level managers, you are better off working some place else. In addition, i found the arrogance of some of the mediocre folks pretty annoying. I have not met many modest people. Everyone likes to always ask a ton of questions to others while not holding themselves to the same bar for their work. All in the name of "Data Driven Company"