Pros
Met is a large old company. It carries allot of weight in the industry so it can get its way. Good salaries, benefits, training opportunities if you take them. Lots of opportunity to excel but it all depends on you taking the lead. Business units are better than IT at getting it right.
Cons
Met is a large old company. IT siloes prevent effective process integration. Change is slow and sometimes technology is lagging (while otherwise implementing good tech choices). Management says the right things but frequently lacks real follow-through. Advancement is all about politics. Lack of coordination causes unnecessary challenges, especially due to the size of the operation. Met isn't just one organization, it is a collection of disparate organizations that sometimes work together.