Anybody have both Herbie's Cone/Spike Pucks and isoacoustics gaia's

Quick update - got my Herbie's sliders yesterday.  Was looking for something to help tighten up a little bloaty bass.  Holy Crow, these things are crazy.  Soundstage is expanded, instrumental separation and clarity is bananas.  Very cool tweak. 

@sjsfiveo,
I have the same thing: concrete floors -> carpet ->granite slab ->speakers.
Had Herbies footers for many many years. But the Gaias play on a different level - at least in my system. In my case they sightened the bass, improved the "naturalness" to the sound and made the sound stage wider. But also remember that there are others on this forum for whom the Gaias did not work per their expectation.
I love Herbies products and use them under my preamp, cd player and power conditioner. Also have Herbie's tube dampers.

Perhaps it has to do with the speakers that are being tested with these products.
I have the Herbie sliders I use them under all of my spikes, including component stands. They allow me to move the stands when needed.
And, I did have them under my speaker spikes until I purchased the Focal Sopra 2’s. The Gaia 1’s under these speakers way outperformed the Herbie sliders. The soundstage widened, deepened, bass tightened etc, etc,

I also have the carpet spikes under the Gaia’s.

ozzy

I tried the Gaia 1's under my ATC SCM100aslt's about a year ago.
Unfortunately I didn't find them an improvement over the basic furniture felt sliders I was using previously. I returned them.

Yesterday I installed some Herbies giant stud gliders (fat dots with gliders and screw in studs attached).
From first listen it was obvious the Herbies footers were an emphatic improvement.
The whole soundfield has more clarity and floats more free of the speakers which disappear more as sound sources. Positioning of instruments in depth is better defined.
The tone and texture of voices/instruments and particularly transients are clearer and more realistic. There's more delicacy and decay to sounds.
It's like a layer of intermodulation distortion has been removed.

Unlike the Gaia's they allow easy movement/repositioning of the heavy SCM100 towers and only raise the speakers 20mm. They are also inconspicuous, which I like.

I use the regular sized gliders under my Skylan stands. Very nice product, no desire to change them.