"Our Pope (and Cardinal Ratzinger) have given strong support to the NCW and the members of the NCW have been prominent, for example, in the World Day of Youth celebrations. "
They were major organizers of World Youth Day in Toronto.
Several years ago, my daughter was backpacking through Europe, and the NCW was at some of the Parishes in England. I did some research at it at the time, and I thought that Rome had approved it, with reservations, for the Parishes in England in which it was already in place, but strongly discouraged it beyond those Parishes.