Pros
The benefits were pretty good. The people I worked with were awesome and genuinely wanted to help me learn and advance my career. Internal mobility is encouraged.
Cons
The culture is still very corporate. The dress code (at least where I was) was business casual. This is pretty minor, but it is annoying as a developer since most tech companies are a lot more casual. Pay is tied to end-of-year performance reviews. In my case, this meant I spent a year with much lower pay than what I should have been getting, since I was not given meaningful assignments until early in my second year. There is a lot of bureaucracy standing in the way of getting anything done. This can lead to not enough work to go around, and you end up doing side-projects and busy work. There are a lot of 'town halls' and other corporate rah-rah sessions that you are pressured to attend and are largely a waste of time. They recently moved us from laptops to a VM system called "Liquid VDI". These can be very slow and sometimes buggy which slows you down and can be very frustrating.