Pros
Great company culture. There are culture groups you can join, professional leadership groups based at the national level and regionally, and leadership are generally easy to talk to. It is the first place where I truly loved my job and the people I worked with everyday. If you are okay with staying at the same pay scale and the same position for a long time (3-5 years) before you are even lucky enough to be promoted, then you will thrive here for years.
Cons
Salary and pay scales are top heavy. At the national level people are typically provided a higher pay rate upon entry compared to the people at the regional level working in the field carrying out mission work. You have to be one of the lucky ones to get promoted to a national position or you have to move to a new department in order to get paid more.