The DragonFly v1.2 sounds clearly superior to my laptop's built-in Realtek HD chip. There is no driver installation needed and I had no problems to use it on Windows, Linux, and MacOS X. The analog volume control works with the OS' volume control. With Debian Linux I experienced once that changing from the built-in sound to the DragonFly put the later on max. volume, which is ear-damaging loud... so beware.   To my ears, the DragonFly sounds better than the X3 in USB DAC mode and far better than my laptop's built-in sound card. If you're looking...