Gary Payne , Nov 19, 2009; 07:33 p.m.
I leave it on, set to low, which has little to no effect. The reason is, if it is on, in Post Processing in NX2, I can move it to a higher setting if needed (I always shoot RAW). I find that under certain circumstances, it can be useful. If ADL is off, then it is off, and no adjustment can be made in Post Processing.