Pros
You'll have lots of opportunities to try new things and grow into roles. The employees are good, honest people - everything you've read online about this place is true. I read them too before I joined, and now I'm here and I'm telling you - the Reddit threads, the Glassdoor reviews, it's all true. Take that for what you will.
Cons
They will do everything in their power to not recognize your contributions so they do not need to pay you more. If you want a raise you need to do the extra work for a minimum of 6 months (your raise won't be backdated though) and you need to have a minimum of 2 positive peer reviews plus your managers. Then they'll consider it. Instead of paying people properly, they offer these stocks that, trust me, aren't actually going to be worth anything. They also enjoy laying people off to secure funding and then once funding is secured, they'll rehire but pay those people less. Often times the lay offs happen to tenured employees 4yrs+ and managers. Lastly, if you are a woman and want a position of leadership, unfortunately this place is not for you. Chronically only men are promoted and women in positions of leadership are frequently the targets of layoffs.