So far I am extremely impressed with the SQ gains with these. I would describe them as neutral, I don’t hear any thinning or over emphasis anywhere. What I am hearing is dramatic reduction in homogenization. Instruments sound more like they should, timbre is improved. Midbass and bass localizes better to individual instruments instead of blurring. The stage feels more airy and the sound is less forward and more enveloping if that makes sense. General timing is improved and everything sounds a bit more live in a very natural way.
I have 2 more on order to add underneath my Dectet which is currently on tile floor.
Overall very cost effective since you can get 6 for $360. They are a little springy so in principle they provide a floating platform for your equipment. The Indigos are rated for 16 lbs per isolators while the Boudreaux are rated to 32lb per isolator.
These really make me want to try the Gaia isolators.