It is still a start-up so there can be volatility in job security from that.
The only benefit they pay for is healthcare (but they have a whole assortment of benefits from dental, vision, disability, 401k, and others, but those are all financed by you at this time). They pay about half for an individual, but the deal is better if you have a family plan as they pick up a large part of that. This is a start-up, so money is still tight, but as they progress, benefits should get better.
While the above is true for professionals, the technician point of view may be different.