Pros
Co-workers are so smart, brilliant - all very fast-moving. True start up experience in terms of people who are action-oriented, hustlers. You will work extremely hard, at all hours, but this is part of the the startup life. You will get paid well.
Cons
At a local level, people are actively advised to "ignore HQ". The local teams have no respect for HQ and vice versa. Feedback will get you fired. It's not just me - this was the most turnover I had ever heard of. By the time of my departure, ~5 local and HQ senior leadership were quitting every month, despite being ~50% of the way through to vesting. They just couldn't take it. Also Culture – skews extremely male and frat. Company wide events made those who dont drink feel unwelcome. Leaders are uninspiring.