Pros
Since my interview, everyone has been preaching Leadership Principles. Where some companies announce their leadership principles maybe once a year, or relate it to a management position, or don't even have any, Amazon really drills into the value of their Leadership Principles. It is refreshing because it provides a direction for making decisions and for good collaboration. Also, I've been lucky to join a large team run by an amazing leader. I could not find a fault in him that contradicts any of the Leadership Principles. And I always thought I worked with smart people, but Amazon really do hire the best... my coworkers are self-motivated, they collaborate so effectively, and they're comrades. When I first joined, everyone was so willing to help. There's an odd duck in the group, but no one seem to treat anyone any different. There's processes that can be improved, because the Team I'm on is working on something new... but there's many other processes that they've got down, amazingly.
Cons
I really don't have any Cons... perhaps because I came from a company that has only a fraction of the Pros of Amazon.