Pros
1. Strong revenue growth and discipline around building a sustainable, profitable business. 2. Culture of performance - given lots of freedom and responsibility 3. Hundreds of millions in annual sales, millions of users, and meaty business/product/eng challenges. 4. "Marketplace of ideas" - employees encouraged to come up with ideas that will move the company forward. Support them with data and you'll get a lot more buy in. 5. Fun, smart folks joining team from large consumer brands, competitive pay, and big new office in San Francisco with snacks, lunch provided 5 days a week, and generous benefits.
Cons
No cons really but for those coming aboard, embrace the culture of freedom and responsibility. Be proactive about seeking guidance. Also there's a refreshingly open communication style of "radical candor" so be ready for open feedback that contributes to a goal of the founders: "to provide the best professional experience of your career".