Pros
Opportunity to work with great and very inteligent people - for the most part - , cutting edge technology and get to know the internals of AWS services. Everyone has an enormous impact from day one.
Cons
I am not sure if it's Amazon, AWS or only this organization but there was a lot of chaos. A complete lack of direction from leadership. As a manager I had to spend a lot of time building unrealistic plans to satisfy the VP and then had to redo them in many opportunities to adjust to the real schedule. The expectations are completely unrealistic, there is no plan. If someone asks you to do something they want it for yesterday. At first hours were pretty much normal but then I changed manager and ended up working non-stop including weekends to satisfy requirements from my manager that worked non-stop as if that was the only thing that existed. In my opinion Amazon - or at least this org -is not a company for moms or people that have other interests or responsibilities outside work.