Pros
High bar for hiring means you are working with people at the top of their game. Great environment for people who want to immerse themselves in a cult, perhaps before moving on to the Moonies or Scientology.
Cons
You will be immersed in the Leadership Principles, which will be mercilessly used against you, or members of your team who are independent thinkers, or who have competence built outside of Amazon. Amazon frequently under-hire, in that they offer you a role beneath what you are capable of performing. Don't take such an offer, as you won't be able to advance quickly. It will take 2 years to demonstrate you can operate at the level you've been hired into, then you might be considered for a promotion. This can be soul destroying when you see the performance of those around you who were offered roles at a higher level. Everything in your role will revolve around what a L8 or higher in the US thinks about you and your performance. Suck up, or get out.