I own Townshends for some speakers, but I am an Isoacoustics dealer and have used them largely under speakers and components for the last 7-8 years even before I started dealing them this year.
Townshends are really great, in my experience, for rear firing or sealed speakers. Not so much for speakers with side firing woofers and certainly not for bottom-firing or bottom-ported speakers. Otherwise, on a suspended floor, they typically will outperform Gaia I for your Wilson, but they will also take up more space and be quite unsightly.
The Gaia I will come quite close in performance for a much lower cost. In any case, on a suspended floor, you’ll want to decouple your speakers and not add basic resonance or dampening.