Let's get this Schiit straight from the horse's mouth:
What does this thing really do?
It isolates your USB DAC from the noisy USB power coming from your computer, and provides a stable, precise oscillator to repeat the USB 2.0 packets.
Why would I want this?
Because some computers don’t play well with USB DACs, and make weird noises or have glitches. Or you believe this makes your system sound better.
Sonic benefits? That’s a lot of hoo-ha!
You’re right. There’s no reason this should make any system sound better. Although we can measure the difference in USB power supply noise, it really shouldn’t matter. Despite this, some listeners have said that there are sonic benefits from using Wyrd. Us, we remain Swiss on the matter—we don’t do the hard sell by promising sonic nirvana.
Seeing as it's the job of an audio reviewer to listen and report, at least that's my job, I have to be, well, less Swiss (more American?) when it comes to writing about the stuff I listen to.