Pros
Organization is build for long term success where core leadership principles, backed by incentive structure nurture a great work culture for learning and innovation. Very strong focus on end customer and continuously raising the bar. Lot of investment in employees to prepare them for the work rigor.
Cons
Pace or work is very intense. Not only would you need to work long hours (initial years) but each of those hour needs far more concentration and productivity than at most other organizations. Amazon encourages and demands very strong writing skills, even senior people write 6 page narratives. Every sentence needs to be very carefully though through, should be backed by thorough analysis, and metrics. If writing and reading does not come naturally to you or if you have grown out of those habits then making your mark at Amazon will be a struggle.