Akeys as a soundcard? quality?

One question. How good is the Analog Keys inbuilt soundcard really, compared to lets say Apogee or RME pci-express soundcard?

NOW, after 2 years of waiting, everything works perfect - Overbridge and no pops anymore from the AK soundcard. ITs like a dream. The only bad thing is that it has no additional Headphones volume level know and a microphone input. Otherwise it would kick ass.

So I am thinking as having it as my main soundcard and adding an external volume knob for the headphones and gain control.

What do you think?