I'm using it to mix 4 channels from Behringer RD-9 (Snare, HiHat, Ride, Crash). It works very well, so there is not much I can write about.
On forums, people are saying that this module is making sound muffled or that the older version did it. I can reassure you that this is not the case with this one. The sound is clean. I don't hear any noise or any sound degradation.