I worked at American Express full-time for more than 3 years
Pros
there are a lots of positive energy
Cons
People are too busy with too little time
Advice to Management
Good to use an open argument discussion
I have been working at Goldman Sachs full-time for more than a year
Pros
Learn a lot in a short amount of time. Given a lot of responsibility and autonomy after summitting initial (Steep) learning curve. The people are fantastic, best I've ever worked with.
Cons
Hours can be long, be sure to set boundaries Pay is okay