My family has a 1st gen Murano with the CVT, and throughout its 150k+ km life (just shy of 100k miles), the CVT has never given us any trouble. (I wish the same can be said for the rest of the car.) Of course it needed regular fluid changes, but every transmission needs that.
Given the Fit / 9th gen Civic's CVT recall, I do have some concerns over the longevity of the tranny. But at this point in time, the piston pin snap rings issue worry me a lot more.
Precision, Smoothness & Control