Pros: lot to learn. great culture and startup like work environment along with benefits of a big company.
Cons: too hectic and unrealistic expectations, life will be stressful at times, in fact, i started gaining weight and losing hair after joining amazon, initiatives are mostly driven by business needs, compromises are made at technical values to cater business needs, work hard, harder and probably make history if you are lucky, no fun
There is lot of opportunity to grow. You will be thrilled to work with lot of Techies around you.
If you join as a fresher then you can learn lot of things from your seniors.