IFi iusb power supply and conditioner any info?

Thank you for the helpful comments.
I just received the 2 units.
I will be using it with my Bryston BDP-2 usb player and my PS Direct Stream Dac.

I seem to be getting a periodic click,(pop, snap)that is driving me crazy. Its faint but I can hear it about every few minutes.
Also, did you find the unit needed burn in time?

Well, I unplugged the units for awhile and when I plugged them back in, the periodic pops are gone. Thank you! I guess I didn't have one of the cables in properly.

However, I still like the sound better without the iFi units.
Audiosource, and Ppeters did your units require break in time?

As the iFi units burn in more (now 100 hours) it seems to be getting better.
At this point it may be a keeper.

How does the IFi compare to the Kingrex double-cable and power unit? Anyone hear both on the same system?

It's doing some great stuff right now for my Mac Mini > Bel Canto uLink > Bel Canto DAC3 playback. Just got it Saturday, so about 100 hours on it. Bass is now better rendered, soundstage width and depth better, greater treble extension, lower noise floor, and overall more relaxed and transparent presentation via the ST fiber link and using Nordost Heimdall USB cable. I used to think that the fiber link had some roll off and attenuation, but not anymore. Not so great recordings aren't prettified, though.