Pros
CEO is very forward thinking. You know that you are doing something important to contribute to society. Coworkers are generally outstanding to work with.
Cons
BUs have very different cultures. Some are really well run. Some have terrible leadership. Some BU executives run the business like a high school clique and only promoting and keeping their friends even when data shows that others increase revenue and productivity more. Institutional knowledge is often overlooked. It is often lost in layoffs or people leaving because they are unhappy. Their is a sense that leadership in certain BUs don't care long term strategy and underpinning their base while growing new areas. They care more about getting a photo with famous people. Lay-off numbers are often hidden by laying people off a little at a time. Certain BUs are arguably anti-American and Americans are the first to be laid off (partially due to higher salaries and because they are not protected like European workers but also partially because there are certain groups who really don't like working with Americans). Career Opportunities can be very limited based on the BU that you are in.