I like about the employer
Benefits, especially health care, were phenomenal. On site food service is delicious.
Being closed at Christmas for a week was nice, until I had to start being on call (including Christmas Day more than once).
I dislike about the employer
The division I was in (SSO) does not do 35 hour work weeks, and many of its departments expect most employees to work evenings and weekends on a routine basis. If you're in a department with on call, expect no regular consideration for additional hours work. Even after overnight calls with work lasting several hours, I was expected to be in the office the next day on time for a full day.
I also felt there were subtle undercurrents of sexism. It was never overt, but if you were the only woman in a meeting (it happened a lot in my department), it could be hard to get a point across. It was more of a dismissive attitude (as if I wasn't in the room), not blatant comments or actions. More than once, I was told to "calm down," as if I were being hysterical.
Finally, if you're someone who needs to take more than 5 sick days per year, don't believe the unlimited sick leave line, In SSO, I was informally counseled two different years for the amount of sick leave I took, including one year where I had an extended FMLA leave approved.