I am also curious about the QV2,because the price isn't too outlandish.
But I would have to audition one or two.
Since it plugs into the empty side of a duplex, it sounds like the old take on wiring up a cap or two to the receptacle.
Or like the old cube thing that my father used to plug his tv into in the 50's, Perhaps I still have it.
I've read a lot of debates about the Quantumness of such products and the posts are very much the same believer denier type postings.
In my view, you'll never know for sure if something works or if it's snake oil until you prove it to yourself.
You'll know whether it works or not,irregardless of what someone thinks might be the end result.
I remember my mother forcing me to try some food item that I just"knew" I wouldn't like, eventhough I had never tasted it before.My mind was made up not to like it.
Later ,when I grew up, most of those foods turned out to be my favourites.
And that's my approach in this hobby.
Try before you buy, and if it doesn't do anything you like, don't buy it.
I can't understand buying it for any other reason.