Pros
When you join Amazon you join an hectic environment where everything is faster that all I knew in my career however you can get what you want when you are engaged and you deliver a lot. You learn so many great things, you work on an international level and you can move from one great job to another in less than 2 years. You can also lead an international career and nothing is impossible. However for these great achievement you have to deliver, no pain no gain but at the end of the day this company is great and unique!
Cons
You have to set your personal limits and find with the support of your manager the right balance between your professional objectives and your personal life. With a great manager (and there are a lot of them within Amazon) you can have more flexibility and freedom than other companies.