Though I ended up returning the Katana, when the sound worked, it was *light years* better than Logitech g560, but I'd say a bit behind Logitech z906 - though I'm still convinced none did spacial audio as well as Katana. I'm keeping the z906 since they're more full, sound pretty fantastic, and definitely have stereo channels on lock; but those magical, dazzling 3D moments.. I really will miss you.
The attached video shows the same track when the audio worked, vs when it didn't. -1 star because for the faultiness, and +4 because I really loved it otherwise.