Pros
Pay is great. It is pegged to law firm market salaries, so you will be able to move in house without a drop in compensation. You will get to be a mini GC and will be very involved in the business you support.
Kontras
There's a reason that Amazon pays so much more than other companies. If they didn't, they wouldn't be able to retain any talent. And despite the big paychecks, the legal department is still a revolving door. The company seems to recognize the turnover issue, but has chosen to address it by building repayment obligations into your employment agreement. Want to leave before you hit two years? Get ready to pay back some of that "signing bonus" and a chunk of your relocation benefits. This is not an easy, satisfying, or fun place to work. Whether your experience at Amazon will be extremely difficult or absolutely unbearable depends entirely on your manager and your clients.