A couple of things.
As for the other benefits - there are none. They don't even have health care yet. They expect to have a plan in place in 1-3 months and I negotiated a stipend to cover my healthcare until then. But they have nothing other than that. No 401k, no dental, no life, no nothing. Salary, vacation, and the promise of a health plan.
Sounds risky and probably won't work out long term.
On the other hand, imagine how many people at Apple, Google, Microsoft, Facebook once said this...