I really don't see any flaws in this unit. It does the job i wanted it to do, and does it well. Granted, i'm not a studio professional so i can't comment on how it sounds, but at least it has no obvious flaws.
EDIT: after a few years of using it, some flaws have appeared. One of the outputs is pretty much dead now. The other one has stereo imbalance on lower volumes, and has a scratchy and noisy volume knob. The other outputs seem to be okay so far, so it's not all bad, but i guess you get what you pay for.