the problem with sonar is that is works on specific types of headphones. and mine are not in the list. as for NX I can tell you I had a little bit of a problem with the installation, since it was the first Waves product I ever installed and Live was not recognising it. but the customer support was helpful and now it works. until now, it seems very promising. I will use it to do my mix and then listen on speakers as well to see if it’s as helpful as the awesome design looks.