I have become a HiFace pimp, but this gadget is phenomenal, for those with a computer-based source. Even better is the HiFace with John Kenny's modifications. The modifications can be DIY and substitute battery-power for USB power. The jitter, or whatever it is, disbelievers will believe after comparing a modded unit to an un-modded unit. As Frank has always told us, the power supply is crucial, and the modded HiFace is a good example. There is a good thread on the Hi-rez circle.
My Vision DAC was always great, better than the Insight DAC that I owned previously, and worth the upgrade, IMO, but the Vision DAC sings like it has never sung before since I have been using the HiFace. I am getting into analogue territory with the modded unit.