Plenty of opportunity and a satisfying work environment for driven, motivated and fun people
Pros
Lots of opportunity to take responsibility. So a good place for motivated self-powered people whose engines run on getting stuff done and taking ownership. Also the site has lots of traffic and users from all over the world, so you feel gratified because there is really the chance to impact a lot of people. Level and time in company don't matter much when it comes to proposing ideas / pushing for a project, logic and data prevail which is good (but also tough if you are passionate about something that may not make business sense). Also there are a good amount of smart colleagues with strong business sense, so good for personal growth.
Cons
The environment isn't for everyone. Colleagues are direct, so you need to be confident and able to take frequent feedback and learn from it. We've been growing fast, so if flowing with changes isn't your thing and you like staying in a static team and getting comfy in it for a while, it may be hard. There is also lots of learning on the job and not a lot of hand holding.