Pros
Overall, the people you work with every day are great. Those that do not perform are quickly weeded out and lower/middle management seemw to care about our happiness and improving the work environment/culture. The building is nice and there is a covered free parking structure for all MP employees. There are also frequent events held in the building, which increases your opportunities to join causes or network within the community. There is potential for upward mobility, if you work hard, network and stand out. Degrees, while important for much higher level roles, don't seem to be as critical for some of the entry level positions. They also offer 100% tuition assistance for those that haven't completed their first degree - Which is a huge perk.
Cons
I think your experience with the company is largely dependent on your management team. I've seen people have great managers who develop them and propel them further in their careers, but I've also see the opposite - Managers who do not want you to grow and stifle potential growth. This is a company where networking is key and it truly is who you know, in addition to your merits, that allows you to advance in your career. Pay is not great and you need to be cautious when advancing as promotional increases seem to be based on what you were making prior to advancement. This leads to a largely increased workload/responsibility and making only pennies (if that) more than some in your previous role. Top talent is lost frequently because of the companies refusal to pay a competitive wage - While I'm sure leadership is living more than comfortably.