If you are willing to grow and improve yourself, Nielsen will help you.
Pros
The employees are all positive and friendly, it is definately a positive working environment. There is plenty of room to move up in the corporation. Nielsen is global so if you work hard in your position it may open up a door to many other opportunities. Nieslen has an open door policy and for the most part communication from management is pretty open. There are always Town Hall meetings that keep all employees up to speed on the changes in our fast processing company, even if those changes include corporate restructures (firings). Nielsen is the largest media research firm period. If you work for Nielsen, you have a lot to be proud of, the company has a great reputation.
Cons
The main downside of working for Nielsen is that if you work your hardest everyday and achieve success, you usually don't get recognized for your contributions to the company. How do you boost morale? I don't know but figure it out.