Pros
Delicious meals, afternoon snacks, some good talent, pretty cool office. Growing...but slowly for a startup. High valuation...that's likely very inflated. Standard equity plan.
Cons
Most everyone stays for the equity, but what people generally don't realize is even with a liquidity event ... realistically not for another 4-7 years ... there is so much dilution that even if you're fully vested your equity will NOT be worth much. Don't count on a big payoff as your sole incentive to stay at the company. You WILL be disappointed. Other than that, there's almost nothing you can get out of Stripe if you've already worked at another tech company in the Valley or elsewhere. Sure, you can treat it as an intellectual exercise and learn something about credit card payments processing, but is that what you really want to spent your time doing?? There are so many interesting companies ... startups or otherwise ... working on amazing projects that it doesn't make any sense to stick with this one.