They have many, varied health insurance options so you can really pick what's best for you.
Work hours are flexible. Insurance options are great. Free access to gym downstairs. Unlimited sick days. Company social events are fun but always local. No free food on any regular basis.
Fully paid health, vision, and dental insurance for employees, 50% for spouse/dependents. Up to 6% 401(k) matching (if you contribute 10%) Free espresso, coffee, soda, juice, coconut water, etc. Free access to the building's gym.
They recently instituted a 401K plan with matching. Matching is up to 4% of salary. Also, they are open (within reason) to people working from home or remotely.