I recently purchased a PhoenixUSB. My first impression following breakin was that it was very good - more separation, soundstage, and focus. But I thought it might have need a tad “HiFi” sounding, but still better with than without. I then bought a PhoenixNET. This device perfectly completes the PhoenixUSB. This device calms down the sound, and makes it totally natural. It gives the music a solidity and a confidence to it. I can’t imagine one without the other now.
That said, I agree that if you have a top end premium streamer that handles the clock already, then I’m not sure it’s worth it. In fact, you could argue that it makes more sense to just go with a top end streamer rather than buying a PhoenixUSB. With the PhoenixUSB you must use a top notch power cord along with the streamer, and you will need a top notch second USB cable. So for all of that cost, it’s not THAT much if a stretch to go for a top end streamer like the InnuOS Statement. In retrospect I think I might have done that instead, and done without the PhoenixUSB. Still would have got the PhoenixNET though.