Pros
Complete lack of politics or BS as everyone is just focused on what's best for the business and our users. Really smart people who care about surrounding themselves with other brilliant, enjoyable, passionate people. Management/Founders are incredibly smart and give great insights without micromanaging. Don't need to float buzz words or do things to make people happy if it doesn't make sense. Finally, the products we work on reach millions of people and we have the potential to do massive things and a leadership team that's not afraid to take risks to do just that.
Kontras
As a young and growing company there are road bumps as we try to implement an effective process into our day to day behavior. Also, at this point while our business and coding is spectacularly effective it's not an end-product that you can brag about to your friends - but the whole team is working hard to change that.