I have done the upgrade from DAC-2 to V2 (with Femto). Definitely worth the money and the time to take apart, put together my system. Much better definition especially in the bass. Overall much smoother (tube like) sound especially with orchestral music and solo violin. The sound of the solo piano in Mari Kodama recording of the Waldstein Sonata is sweet and delicate. Listening fatigue is also greatly improved. Highly recommended.