Roughly a month ago I received a new pair of Townshend Audio Seismic Isolation Podiums for my T10 Actives. I've done quite a lot of listening since then.
The degree of improvement with the Podiums are dramatic, not subtle, and apply through the entire frequency range. The Podiums are said to reduce the interaction of speaker vibrations and the room, and also limit the same aberrations coming back again into the speakers, thereby reducing smearing and veiling of fine detail.
I'm now hearing musical reproduction that better shows the true potential of the T10s, with much less of the room singing along out of tune and out of time. (I don't have a particularly bad room. Negative artifacts are there in virtually all rooms, but can be reduced in those that are professionally designed, purpose-built and well acoustically treated.)
I can't speak to IsoAcoustics, no experience.
Brian