Pros
The admin positions are usually through a collective bargaining unit which offers perks such as free computer classes for you and your family as well as a tuition fund if you take classes at a different university. There's also a child care subsidy fund that gets split amongst eligible union applicants with children aged 12 and under. 20 vacation days, 12 sick days, and 3 personal days a year. There's also paid holidays for most major holidays. Set schedule of monday-friday 9-5pm with weekends off.
Cons
Dependent on which department you work in, you may be limited in growth opportunities and would have to look towards other departments for promotional opportunities. Some supervisors micro manage. There's no overtime for union support staff. Starting salaries are also not as high or competitively priced as they should be considering the cost of living in the nyc metro area.