Pros
As a customer of Amazon Prime for years, and unknowingly a customer of AWS via Netflix and other large AWS customers, I have always been impressed with the service and offerings. Now that I'm on the other side, I get it. There is no secret sauce here, there's just a passionate obsession over customers. It's elevated to an art form here.
Cons
These aren't necessarily cons, but facts to consider before you apply to AWS. It's a self-serve company. While there are tons of resources to help, both human and otherwise, you've got to figure it out on your own. It's not your typical corporate environment, with office managers and administrative assistants at your beck and call. Be comfortable with figuring stuff out on your own - actually, thrive at it - and you'll do well.