Vantaggi
The compensation and benefits are good. The coworkers are mostly good people and always happy to help. You're rarely expected to do more work than you're able to at a sustainable rate.
Svantaggi
The nail which sticks up is hammered down. If you want to apply latest tech trends or grow in a tech career, forget about it. The company has grown complacent as the leader in its niche. The tech stack is 10-15 years old and will become a limiting factor for the speed of innovation, yet any suggestion for different ways of doing things is met with "we haven't needed it before, why would we need it now" or "we already had someone look into it and it didn't work". Promotions are meaningless yet difficult to get. They seem to depend on being friends with the right people, or having gone to the right schools. Don't expect managers to be interested in your career growth. People in EU beware: Upper management in the US considers the work done in some of the European offices subpar.