Pros
Smart, passionate people. I know everyone says it, but it blows me away here. So many smart things are happening. People are ambitious, creative, hardworking and collaborative. I used to hate being asked to collaborate (as I thought it would slow things down). It makes so many good things happen here. It is also fun to be here. Fun problems to solve. Fun new solutions. Very real CEO. Love the "maximum flexibility" approach to organizing your work/life. Lots of the standards (stocked kitchen, free lunches on wednesday, expense your commute costs, 401k match, 4 month mat leave) -- it is the work itself that is unusual.
Cons
Some loss of focus, especially in the product area. Almost too many things going on. Need more alignment as we launch new products. And the pace is super fast. It is both energizing and exhausting.