Pros
You can work from home without fuss, decent benefits but health insurance is pricey, some nice coworkers and in theory the ability to rotate teams.
Cons
I came into a highly disfunctional group comprised of an acquired company (Harris Interactive). it's difficult for us to integrate and really network with the actual Nielsen employees in the traditional divisions who don't do anything similar to the custom survey work we do. Our revenue has been falling and just this week they announced to us that they laid off three top personnel as well as a junior employee who I know is pregnant. the top-down management style in this group is rigid and the directors will all throw anyone under the bus to make themselves look better. It's a toxic atmosphere where the name of the game is to cover your butt and find someone to blame. Project directors and consultants make demands without regard for analyst's workloads which creates a lot of unnecessary stress those of us junior staff who often work on 4-6 projects at once.