I have Gaia III’s under my Focal’s and Sonus Faber’s. I can’t tell that they make any difference in sound, but they are much more convenient than dealing with spikes. I’m trying to get away from spikes.
My biggest complaint with the Isoacoustic Gaia’s, is the manufacturing issues of them. I’ve purchased two sets now where the threaded holes are not completely plumb. One set was so bad that I had to send it back for a replacement. Some of the others are just slightly off and due to the rubber footing and the way it can offset some of this, it hasn’t been a problem on the others.
One would think for things at this price that they could at least have better manufacturing qualities though.
Cheers