Pros
Not a lot. They tout "stability" and "customer focus" but customers have consistently expressed growing discontent with their services.
Kontras
Some of the worst micromanaging, "my way or the highway" attitudes I've ever encountered from senior leadership who would at any other company be a middle manager at best. I have no idea why logically the people that run this place put up with certain individuals' (and their peons) attitudes; no wonder customers don't like working with them.
If you are looking for a place to grow your career, avoid.
Also - owned by Koch. That should say enough about their values.