Stillpoints Ultra SS under your speakers?

I originally purchase 8 of these to place under my source components but after reading about loudspeaker coupling/decoupling (http://www.genesisloudspeakers.com/whitepaper/Genesis_Loudspeaker_Coupling_Decoupling.pdf), I decided to try these under my Vandersteen 3A Signatures. I got the same results as Maril555 above, the bass was enough of an improvement that I purchased another 4 and placed the remainder under my pair of Vandersteen 2Wq's. The results weren't as dramatic as with the 3A's but enough that I left them in. One thing I do like about them, it's a whole lot easier to move speakers around without those spikes digging into the carpet.