Pros
Amazon has wide variety of products to work on. E-commerce, AWS, Amazon Chime, Alexa etc and this allows team members to work on different things. Good structured ways of doing things and well defined process for conducting interview, performance management, data-point driven promotion etc. Quarterly promotion cycles upto L6 which means that even if you miss a little a thing here or there, you don't have to wait for 6 months or a year. Concept of BR is unique and there is wide variety of it (Hiring BR, CM BR, COE BR, Infoset BR, Ux BR...). An amazing document writing culture where things are data-driven.
Kontras
If you are joining as external candidate, please note that Amazon hiring bar is different than internal promotion bar. So in the hiring process, they will insist you need 10 years for L6, 15 for L7 etc, but internally there are folks with L6 at 5, L7 at 8-10. Hiring bar is also" better than 50% at a particular level", but promotion bar is only entry level of a bracket. This means that you will slowly move from imposter syndrome to Dunning–Kruger as you work with internally grown colleagues. For external hires, cultural adjustments will also take sometime. Overall you may end up growing slowly than your internal peers even after clearing so-called 50% bar. If you are working in non-Seattle locations, especially eastern economies, there are chances that some of the management have made their way in through middle level companies and they are making big money as Amazon has expanded big time with bloated egos. Providing insights to them is not easy. "Learn and Be Curious" leadership principle is regularly violated if you are coming from outside and have your suggestions/opinions. You will hear things to the tone of "This is what we do at Amazon" Amazon has met with lots of success recently, but from a bar perspective they are equivalent to other companies like Microsoft, Paypal, Adobe etc, despite what they tell you.