Pros
1) Cutting edge everything - you can get practical experience in real-time processing, filesystems, hadoop, etc 2) Awesome people 3) Good culture- chill but hardworking 4) Easy to move around if you wish to join a different team 5) Great perks - catered lunch and dinner 6) Great location
Cons
1) For some people it might be a bit too corporate, by which I mean it is not a tiny startup anymore and there do need to be some 'processes' which is deadly for those who like zero constraints on commits, etc that you might get at a small startup 2) I think people can be a little too focused on compensation as a reason to work and put in extra effort. That sounds naive, but in some places the internal reason might be 'wanting to change the world' etc but in the internet advertising space, that is just not going to be the case 3) Friends/Steve Yegge/family potentially regard the company as not a Good Thing to be doing / kind of sketchy. It really is not (although I admit the personal bias) but you may have some awkward conversations