Pros
Lots of opportunities to learn and apply new technologies, to develope ideas and build them, and to contribute in other ways. Grwat ability to gain exposure to different clients in different industries in different areas if the world.
Cons
In addition to being allocated onto engagements full time, you also are expected to contribute to other areas of business such as recruiting and publishing articles and building new capabilities. These are great opportunities too , but turns into a lot of hours. The Leadership Principals by which you are judged can be interpreted for or against you based on how you are perceived politically. You can also get excluded from engagements or put on difficult ones based on the same. It is not necessarily based on your performance on client engagements. Politics, and being part of the club, are present in every company, but I would say they are perhaps much more intense in the Amazon workplace culture. So that there is a bias for those with the "in club" vs "I just want to do my work and do right by the company and its clients" mentalities.