When I added the Wizard a couple of years ago, I had been reconstituting my system from long storage and adding to it. I had the basics down and my system was starting to show potential. It was fully broken in and seasoned. I had very high quality power filtration including an Equitech 2Q Balanced Power Conditioner etc.
The Wizard was one of the first big 'tweaks' I added into the system. I had an older Symphony Pro that I plugged in for a while, and was surprised that I could hear its effect clearly. The difference was a greater depth and width of soundstage, more liquidity to the sound, and less 'hash' in the treble. So I decided to try the Wizard which was on a healthy sale discount.
When I plugged in the Wizard, the following changes were quite big. I would say it was the overall equivalent of upgrading ALL the components in my system by two to three levels or what I would expect by buying components that were 2X the cost of my current line up. The soundstage widened and deepened, almost disappearing into my walls. The bass just rolled out into the room, deep and musical. The top end was incredibly extended and smooth, so much noise and hash I didn't know was just gone. Everything sounded both warm and pristine.
Since then I've had lots of upgrades and have focused a lot on these kind of power, grounding and EMI/RFI improvements, including other products that use Schumann based resonances. Other stuff has had similar or in some ways better results, and I think my system is really well balanced now. The Wizard has stayed, but that initial experience was revelatory. I haven't heard the other models they have.