Pros
Some employees over time were very cool. They did not stick around though. Unfortunately, a very poor breed of management has run of the place and the only way to have a seat at the table is to convince them you are so stupid that you are not a threat to their position. Some can play that game, I could not. The only pro is you can come into work running on your last brain cell if you wish because most of your colleagues will already be on that level and keeping up will not be a challenge.
Cons
You do not learn anything. Management won't let you advance or move internally because they are all so dumb and under-qualified that anyone trying to learn or make more money is scary to them and a threat that must be eliminated. Very little turnover in management, mostly because nobody else would have them. They sit around, make bad decisions and collect a paycheck. Incompetence is not only appreciated, it thrives.
