Pros
hours are consistent, no overtime. good benefits. very few layoffs.
Cons
work is broken into repetitive, boring tasks. Mid-level management is recruited right out of undergrad and does not have the work experience to question upper management rules. Mid-level managers think citing you for being 2 minutes late, wearing a hat, or having coffee at you desk is good management - they don't know any better. The general staff is way too experienced for the work they do (PhDs doing entry level work) and they are bitter and desperate for validation. A group of awkward adults all trying to prove themselves interesting and cool. They are not. There us a lot of "training" which involves learning McM procedures and jargon. Skills are not transferable to other employers. It is extremely rare for people to advance from the position they were hired into.