Pros
You won't be working with idiots here. Amazon hires some of the brightest peolple around. If you have any leadership ability at all, you'll stand out. The place is attractive and clean. The starting compensation was way above average for my field.
Cons
Everyone here is smart, so people sometimes have a problem not getting their way. No expectation that you have a personal life. Long, long hours and weekends, or you're not a team player. (Bad.) Co-workers will take credit for your ideas and work because the atmosphere is hyper-competitive. Prepare to be talked about behind your back. You'll feel emotionally and physically burnt out very quickly. Amazon is not a dreamy world of brilliant hippie hipsters. It's as corporate as any place in NYC.