Very successful eCommerce company where I managed to reach my potential
Pros
Very flat organizational structure. Multicultural environment of over 100 nationalities. Work hard play hard. If you do well for the company the company does very well for you. But a career and the rewards do not come for free you have to work hard for it.
Cons
Very strong culture that you either like or not. This may be a drawback for some, not for me but I've seen people struggle with this. Technically you have to accept that the business comes first and that getting new features and functionality out there quickly is always more important. Code quality is never a goal in itself. Most code will be used for a very short time anyway as everything is A/B testsed and most test fail. Deploying new technology because it shiny and new is not tolerated.