Pros
I joined Amazon about 2 years ago and like most, I read the reviews on glassdoors and got so scared. Amazon is a BIG company. Everyone that has worked for large companies knows that there are always the pockets of bad teams or bad match between a hire and the company. Now, it's also more common for people to write bad feedback than good feedback. As an example, it's rare to get out of a good experience on a restaurant and go write a good review on Yelp. You will usually go and write a bad review when you didn't like something. Back to topic! I'm having an amazing time at Amazon. I manage 2 teams of developers, haven't had any attrition, the team is happy, and all of us work normal hours. We often have social events and there is very minimal top down guidance about how the team works and what we should focus on. We build our own roadmap and think long term. It really feels like working in a startup but much more stable. If you have the chance of working at Amazon, ask lots of questions about the team you're going into, be passionate about the space you're working, and you will have a great time. Oh, and if you by any chance join a bad team, after 1 year you can internally transfer without any problems.
Cons
Main cons is similar to what was I mentioned above. There is the chance of joining bad team - like in ANY other company. At least remember that you can switch after 12 months.