Pros
The job is highly detail oriented, but they provide you with the tools to do the job. There is a very good training program and the company is very loyal to it's employees. You do get a lot of feedback on your work and as a general rule everyone wants to see you succeed.
Cons
While it seems like there's always an open position, it feels very difficult to move ahead in the company. Promotions are often based on tenure and/or popularity. If there are specific reasons you were passed over they aren't really explained to you. Management in general seems to want to succeed, but they all have very different ideas about how to achieve it. Also, there is a lack of uniformity among the branches. Each is run almost like an individual fiefdom.