Definitely very good if it was not for ..

I had bought the sound card, in the hope of getting a decent output on my laptop. After the DriversCD did not work (could not be read), I have the appropriate driver from the net. Thanks to this location at the pros reviewers! So far so good. The setup worked so far has been recognized by Windows. So: sufficient for normal users through a small detour. So why the poor review?
Since there are four points that stand out negatively.
1) The sound card has a relatively loud noise, which is annoying.
2.) Once the laptop is switched on, the sound card receives power. However, these can not handle the reasonable. Hence it is in the time when booting up the laptop, always loud clicking noises. The Freqenz is so deep that the subwoofer is addressed.
3.) If the sound card is off, it still makes for sound interference. A crackling is on the line, and not too low. It may be that I'm the only one affected since. But beware, it could also meet other.
4.) For normal users probably the lesser evil, for me but still a reason for return: The sound card should actually the DJ equipment are completed. Only problem: Under Traktor Pro 2, the card is not recognized. Even after some play around it was nothing. Too bad!
So if you want mix order, should beware.