Pros
Great learning curve and compensates well if you're successful and challenge yourself to operate outside your comfort zone. I managed a fantastic team and worked with some wonderful leaders and peers. Got promoted when I moved departments so was able to grow my career. Fascinating products and vision. Enjoyed leading my team to high achievements out in the field.
Cons
Way too American, when I was there. Some jokers in top management wouldn't believe this and deny even a customer saying it to his face! Maybe this has changed now but post-Tribune acquisition the culture certainly changed and the fun was ripped out of GN's soul, but we were still successful. Big culture difference between east coast TMS folks and west coast Californian dudes, which was funny to watch. Americans and Europeans interacting was weird too. Not for nothing was the term the "Donald Trump of metadata" coined! See now the CEO and CRO have left since the Nielsen acquisition. Still have many good contacts there. Most seem happy....As for myself, we parted ways for various reasons and I left on a high. I am glad I did.