Pros
Not all imprints/departments are horrible - just a few bitter Bettys who are incompetent, rude, and will blame their assistants. I had great experiences with 4 out of the 5 imprints I worked for! Finding amazing mentorship from VPs & Directors. It's the pretentious publicists who mask their lame insecurities by being rude and royally passive aggressive.
Cons
Worked for amazing teams within PRH but unfortunately found myself in a role working for a belittling monster who was hypocritical, toxic, and passive aggressive. Her insecurities made my day-to-day beyond stressful. She micromanaged every task, questioned my intelligence. Of course when I went to HR, they protected their own and basically said there was nothing they could do. So I quit. It's one small imprint that is toxic from the top down, which explains why all their assistants end up quitting.