I'm pretty sure I detailed my impressions of the Isoacoustics Gaia under my Thiel 2.7s somewhere not long ago in this thread. But just in case I'll copy/paste my comments from another thread:
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So..finally...I got around to trying some Isoacoustic Gaia 2 isolators. I’m really late to the party with those. One reason is that I actually had some isoacoustic pucks left over from building an isolation base for my turntable. I’d tried the four of them under one speaker, didn’t think I heard anything I cared for. So I followed through with the Townshend stuff which seemed to be rated even higher than the isoacoustics for decoupling. (Plus...I’d done my own experiments measuring the vibration isolation properties of the Townshend springs vs the Isoacoustic pucks I had, and the Townshends provided far superior decoupling).
What I was looking for, ideally, was to get enough isolation beneath the speakers such that the bass would tighten up, they’d disappear some more, but not SO much that I lose any sense of room feel and palpability to the sound that happens when I fully decoupled with spring footers. I figured perhaps the Isouacoustic Gaia just might be that that 1/2 way point.
And...that is pretty much what I seem to be getting!
With the Gaia’s installed, the bass tightened up pretty nicely, the speakers did vanish a bit more from top to bottom, a bit more space around instruments/voices, but the speakers still have some density and punch as well.
I’m still getting used to it, evaluating if I’m going to keep the Gaias under the speakers or not. It did slightly change the tone of the speakers and I’m not sure how I’ll get along with that. I need more listening. But so far I’m quite impressed with the product.