Pros
The facility is beautiful. Glass windows all over, brand new building, full cafeteria, the latest conference room technologies, on site health clinic, on site day care, and on site gym. Having these amenities, and others I didn't mention, helps make you feel like a valued member of the company, as they at least seem to be trying to make you feel appreciated. It's not all about how much you make in a job (a lot of it is), but it's also is about not hating the job and company you have every day you go in.
Cons
This might be due to being an online retailer, but things move fast. The projects and tasks occasionally shift focus and direction while being completed due to priorities which can happen over night. There are many teams each controlling a different parts of the website, and very often if becomes hard to not step on each other toes when working on a project.