Pros
You have the opportunity to work with proven leaders who have built unicorns. I can see that my contribution is much greater here than at past larger orgs and a ton more freedom to run. There is a massive TAM to sell into and products launch/update consistently so solid expansion ops. The company has a huge advantage against bigger players in the industry. Everyone who works here is brilliant and they don't hire people unless they raise the bar for everyone else.
Cons
It's not a 50-60 hour work week but you have to keep your side of the street clean and be extremely accountable. You're working directly with executives who are really good at what they do and have high expectations. For some people they can't handle being that close to the fire. They aren't much different than other any other executive leadership, it's just proximity that freaks people out.