Hi Hilde,
I have a pair of Focal Sopra 2 driven by a Hegel H390. I had the GAIA feet under them for a couple of years, for a while driven by an H360. Before that I used spikes. Hardwood floor. Something about the system always seemed lacking to me. The highs were there but not "clear" or "precise" which made no sense to me as those beryllium tweeters are super fast . Mids were a bit smeared, bass sounded deep and fine, to the depth they go anyway.
On a whim, almost impulse buy, I bought the Townshend Bars, as the regular stands are too big for the location of the speakers. The impact has been shockingly transformative. The weirdest thing is how much better the beryllium tweeters sound. Mids have lost the smear, vocals are richer and more defined and while I thought the bass was fine, turns out I was wrong. But it's much better now.
I think what the Townshends do is prevent the floor from becoming energized by the speaker. When the floor becomes energized it becomes another speaker in the room, and a rather poor one at that. So while my speakers were actually doing a great job on their own, by the time the sound got to my ears, 10-20 feet away, it had been stepped all over by the crappy sound being generated by my floor "speakers ". At least that's my hypothesis.
I know the Townshends are a bit pricey, but they are easily one of the best tweaks I've ever made.