There are a lot of things I like about NWC vs "F" - I find NWC's user interface to be more intuitive, I like that I can select and edit individual notes easily and that it's so much like a text editor. That said, there are significant failings. Setting up an acceptable printed version of a piece is still a tortuous process, for example. I've played around with FretQwik to enter guitar chord diagrams, and I find it to be klugey and difficult to use, partly because the Typecase character map software does not appear to be available any more (can't find it despite numerous attempts with Google). Finale Songwriter does these things more easily and better than NWC for not much more money. If NWC would only improve in these areas I'd never consider another music editor.
DISCLAIMER: I don't give a hang about playback, I'm only interested in good quality printed scores.