Also interesting to note is that setting ADL on Low gives you about 1/3 stop more dynamic range with no hit on exposure settings. (Typically ADL will lower exposure speed a bit to preserve highlights in addition to the other editing the camera performs on the shadows.)
From experience, I can say that ADL behaves differently from the NX2 Edit Step named "D-Lighting" or from the NX2 Quick Fix "Shadow Protection" (oddly named, that one).
As usual, Nikon's insistence on making the in-camera ADL setting proprietary has ruined this in-camera ADL tool for those who cannot or will not convert in one of Nikon's own converters.
The ADL setting is quite useful in brightly lit, contrasty scenes primarily for keeping shadows open. For certain But do experiment with it before you reject it totally. Shoot some NEF + Jpeg sets so that the ADL setting is preserved for you to see how it works.