Flexible environment, lots of smart people, lot of dumb people. Very big place so YMMV in different departments - very decent benefits although things are changing.
Cons
Very difficult to advance without transferring around to different departments. A lot of deadwood employees just hanging around to collect retirement. Having to deal with faculty can be a headache sometimes.
Lots of smart people. Lots of flexibility in work arrangements. Laid back environment. Pay is decent given the benefits and freedom. Big place with lots of interesting things going on.
Cons
Lots of people who don't work very hard. Hard to figure out why people are managers. Pay stagnent and probably going to drop (furloughs). Big place. Sharp divide between professors and staff. Political.