Snake oil implies that these products have no value what-so-ever. Even if you don't see a value in a small dedicated device that replaces a typical computer in the audio room that doesn't imply it's snake oil.
These products cost what they cost and if someone needs a cheaper product I'm not against them buying something else. However, I see no reason to insult our customers because they do see value in us making these products and supporting them.
You referred to a particular review and not "reviews" as you wrote. There are plenty of audio reviews recommending our products. However, let's not take one deceptive review as a universal truth. First, every laptop I have measured has shown to pass it's SMPS noise via USB unless it was powered by battery only where clearly there is no AC noise to pass. Second , if you are worried about SMPS noise then use John S' grounding trick and listen for yourself if the noise matters to you or not. In summary...a simple wire will null the affect of a noisy power supply. Remember though you can always use a better power supply and I encourage it. Anyway, I won't judge you if you use a SMPS because you don't care and don't worry about very low level noise over the signal that even your dog can't hear. BTW I have not measured our competitors products, but the grounding trick should work on them as well. Third, remember that balanced DACs will likely null the noise all on their own so no reason to do anything with them.
...thats is the consensus "here".