Steve Reeve, reviewer for Fine Art, has the following to say about the KLEI™gZero3D SPDIF/IC in his Fine Arts review:
In this case, KLEInnovations offers two exceptional SPDIFs, both perform extremely well. neither will disappoint, and both are modestly priced, i.e. compared some of the more expensive cables from other brands that attempt to offer similar abilities
If you are serious about enhancing the abilities of the digital reproduction components of your audio system the KLEI gZero3D IC will not disappoint and bring you that much closer to analogue nirvana.
If your digital components are used more for background music then the KLEI gZero2D IC may suit your needs better. But you might just find that will change your views on digitally sourced music once you hear them.