I love this plugin, it made my life so much easier. It has a button that flatten out the frequency response of my HD650 so everything that is done with headphones sound exactly the same on my main monitors, sick stuff. Even better is that it is made entirely for me and my workflow!
Everyone should put in the effort to flatten their headphone response, use this site as a guide to make your own compensating EQ curve: http://www.headphone.com/pages/build-a-graph
Or, use ‘Noisebud – Listen’ if you’re on a PC and use Sennheiser HD 650