Pros
On the surface level, the culture is great. The majority of the talent pool is young, fresh, and energetic. The company strives to promote social activities and provides treats like bagels on Friday. There is a good work life balance where working from home is common. Additionally, Nielsen has a strong reputation in the research space, so it is a great point to have on your resume.
Cons
While the company advocates so heavily for innovation and supposedly strives to be "simple, open, and integrated" they almost force you to stay in one small space and discourage you from seeking additional ways to bring value. It is also heavily relationship oriented, so if someone doesn't like you, you will quickly be pushed out of the company, especially if you are found to be working harder than your counterparts as this is "demotivating" and others will "think they need to work just as hard". The pay is extremely lousy. It is not at all competitive with other companies in the industry or in the geographic region. Also, despite the fact that it is claimed to be a meritocracy most entry level employees come through in waves of classes and they are all promoted at the exact same time -- indicating that somehow everyone is performing at the same level as everyone else. I do not recommend this company.