Pros
I have worked for Amazon in operations for nearly 7 years and while it has not always been easy, it has been an overall great experience and I would strongly recommend it to anyone who is willing to put in the effort. Amazon managers work hard and are held to high expectations which simply is not for everyone. For me personally, I have loved being surrounded by highly intelligent people who have a great work ethic and who care passionately about taking care of customers and contributing to the success of the organization so I actually prefer the fact that we demand a lot of managers and in doing so we end up with very high quality managers. One of the best things about the company is how empowered managers are to make a difference and have an enormous impact. Overall it's hard to beat Amazon in terms of a fun company to work for that will push you to grow and provide you with awesome opportunities. Anyone who can get through the tough hiring process is crazy not to take a job with Amazon as long as you're willing to work and not simply looking for an easy paycheck.
Cons
The work life balance can be challenging at times but to some degree it can come down to how you, as an individual, manage yourself. Sprint when you have to (peak) but catch your breath (use your paid time off) when you can. The only other con is that there are a large number of very weak people leaders in the company (super smart but terrible with people) and there are so many of them in senior positions that it is a self propagating issue since they do not understand their own shortcomings and the danger of continuing to hire/promote other people like themselves. That being said, there has been some notable improvement in recent years and I'm happy to say that I've crossed paths with some exceptional leaders in senior positions recently.