I did an extensive comparison more than a year ago of various 'footers' under the tube power supply to my phono stage. The differences were noticeable, and not all for the better. Among the products I compared were:
Herbie's footers (made the sound softer, less dynamic); HRS footers with companion damping plates- not much + or -, frankly, I don't think the component was big enough or heavy enough to benefit from these; Aurios (these brought amazing tightness to the bass but created a harshness in the upper registers that was untenable- i fiddled with additional damping of these, but it was too much trouble for too little benefit); a proprietary roller-block- pretty good, not as 'tight' as the Aurios, but less fatiguing; Vibrapod- cone plus puck- amazing, for the price- the surprise entry for me, given their low cost and the fact that they have been around forever; Stillpoints Ultra SS- what I chose to use- gave me some of the benefits of the Aurios without the downsides. None of these were used on a turntable. I had to go thru the tortures of the damned to isolate that- since it is very high mass and I have a springy floor. Wound up using even more mass for the supporting table, plus massive chunks of sorbothane under the table legs (the supporting table is probably 250 lbs), plus HRS custom platform (which is probably 60 lbs) plus turntable (160 lbs). All my electronics are tube-based, and I'm still using Grand Prix stands that are tricked out with carbon shelves and Apex footers. These were state of the art circa 2006 or so, when I bought them and I keep them 'refreshed' with new sorbothane pads.
Never tried the Gingko.
I agree that you have to experiment- i'm not sure one size fits all for any of this stuff and it can get costly.