Apparently my ears suck.
I borrowed the thing, connected the E07K to the USB port, set it as the default playback device, set the quality to 96K Hz....
and dont really notice much difference.
Will end up buying it anyways as the guy really needs money, but I wont pay more than 40 bucks.
Maybe with time or after I can easily switch my headphone back and forth between the onboard soundcard and the amp I will notice an improvement.