I ran a demo of NX2 about 2 years ago and quite frankly NX2 is the only program to use if you require the absolute best processing from your RAW files. However the program itself is so damned clunky that I soon dismissed any ideas of buying it and went back to Aperture. Later I thought I'd give it a go again, but then found out that it wouldn't run reliably on Mac OS 10.6, and this was about 9 months after it's release. I've never looked at it again because if Nikon couldn't be bothered to address the problems in a timely manner then I can't trust that software.