Pros
I've been working for Amazon Web Services for over five years now and I have enjoyed the experience. I appreciate excellent work-life balance. It's extremely rare to work more than 40 hours/week or to work in the evening/weekend. I have lots of vacation and virtually no restriction when I can take it. On-call is unfortunately a thing but it's just one week every 2-3 months. Sometimes I won't get paged at all, sometimes a get woken up one or twice but again that's very rare and we definitely consider instances where people got paged to be Bad Things and try to remedy them. Comp seems solid but I have admittedly not done a whole lot of shopping around lately.
Kontras
Open space offices. I hate open space office and strongly believe it detracts from effective collaboration and productivity. But this is not unique to Amazon, you'll get this at most tech companies.