Rangefinder Forum had a discussion on NCPS "enhanced" scanning. I made the following posts, which may be of interest here.
The NCPS "enhanced" scan resolves grain on 135 velvia 100.
I've had quite nice scans from NCPS on Velvia when the exposure was on and the light was good. I've had poor scans when the light and exposure were challenging. In the latter case, I sent out for drum scans with an experienced, independent photographer ($30 for 645), who extracted great color and dynamic range. He also corrected some magenta cast, which he thought came from over-used developer. NCPS supplies 8-bit jpgs, which don't allow you much latitude for exposure, fill and recovery in ACR.
Here's an example where the drum scan was necessary, and the NCPS "enhanced" scan couldn't capture the dynamic range. From my "Landscape, Nature, Weather" gallery at
PhotoKinesis.info (2-shot pano from Velvia 100 on Pentax 645N at 35mm; I'm not completely happy with my final image, but do me a favor and view it a good monitor!):