Pros
Very strong engagement efforts. All about fun and celebration. Quirky people. Management provides a fairly consistent message. Continuously developing programs to offer educational opportunities (MARS University). Good pay and benefits. Strongly emphasis on the 'human-factor' and good work-life balance. Open office environment spurs collaboration and approachability. Private company mentality celebrates freedom and measured risk taking. No micro-management.
Cons
Very loose processes, lack of maturity in areas that matter and can effect the bottom line. Not a very dynamic environment. Overtly focused on generalists that can be dropped into new roles every 2-3 years. Do not value technical expertise (although this is supposed to change). Hire people based on personality rather than technical skills. A very consensus driven environment, everyone can say no, few can say yes. Very lean and cost-conscientious. Speak highly about career growth but path is not well defined by HR. Hard to get noticed and equally hard to get fired. Lots of average generalists that lack industry knowledge.