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Most people seem to shift away from NX2 to something else, usually Lightroom and, to a lesser extent Aperture. I do not know about Aperture, but LR now does a very good job of rendering Nikon files (I think Aperture does as well).
In earlier versions of LR and Aperture, the rendering was inferior to the Nikon product, which was why some people stuck with NX2, in spite of it being difficult to use in the opinion of many. Now that the other products do a good job on the files, many switch. Spend some time with it to see if you are comfortable with how it works. The control points are nice and I like how it adjusts the curves when you move the center slider. However once Local editing was available for LR3, I stopped using NX2. The other products also have the image management features that NX2 lacks.